What Are LSI Keywords and How Do You Find Them?

What Are Lsi Keywords and How Do You Find Them?

In today’s competitive world, business owners are uninterested in a single keyword to get good rankings in search engines. Nowadays, almost 15% of the daily searches in Google are primarily on new terms that have never been searched for before. These ads up to millions of new search queries enquired about each year. That is why LSI keywords have become a significant aspect of the Google ranking. LSI keywords can assist in improving search visibility and improving contextuality. LSI keywords or Latent Semantic Index keywords are highly useful for SEO.

Now, you need clarification about what LSI keywords are and how they can help you rank the website higher in Google or other search engines.

Worry not, as in this writing, we will offer information related to LSI keywords and how they can improve your SEO, draw in more customers, and attract relevant organic traffic. So, let’s get ready to know more about the Latent Semantic Index below.

What Are LSI Keywords?

LSI keywords are phrases that are semantically relevant to the primary keyword. LSI keywords can and cannot be synonyms for the main keyword and are closely related to it for defining the piece of content on a page. The best way to understand the primary difference between LSI keywords and synonyms is to perform a Google search. The recommended search results that appear in the drop-down menu are the LSI keywords.

For instance, if the primary keyword of a page is debit cards, then the LSI keywords of that page will be available balance, interest rates, money, and many more.

LSI keywords are designed to learn more about related keywords depending on the context. In SEO terms, the LSI keyword supports content by adding more contexts to it. It thus assists both the search engine and users in knowing more about the content.

What Is Latent Semantic Indexing?

Latent Semantic Indexing or Latent Semantic Analysis is an NLP (Natural Language Processing) language for recognizing the contextual relationships between words. Latent semantic indexing assists in identifying the latent relationships between the semantics or words for improving the information indexing or understanding.

Understanding a page’s content can assist in determining the topic, depending on the usage of the language. Search engines like Google implement this technique for understanding the particular synonyms and figuring out the specific topic. Thus, writing an in-depth topic by using LSI keywords throughout the content will help search engines understand the website better and rapidly.

How Does LSI Work?

LSI works by implementing the partial SVD (Singular Value Decomposition) application. SVD acts like a mathematical operation to decrease a matrix to the constituent parts for efficient and hassle-free calculations. While examining a word string, LSI eliminates the stop words like pronouns, common verbs, and conjunctions.

For instance, if we want to find the LSI on documents related to seasons, the SVD will identify certain things like:

  • Autumn is synonymous with fall.
  • Phrases like season, winter, summer, fall, and others are semantically related keywords in your content.
  • Fall is semantically related to two sets of words meaning different things. One is fall, related to seasons, summer, winter, and spring, and the other is related to accidents, sprain, doctor, and slip.

Search engines use this data to go beyond delivering results of exact query matching and offer more related search results.

Does Google Use LSI in Their Algorithm?

After going through the above segment, is it still difficult to assume whether Google uses LSI in its algorithm?

Within the SEO community, optimizing web content with the help of LSI keywords assists Google in understanding it and, as a result, rewarding the content with a high ranking. Google not only bolds the exact phrases that you search for, but they also bold the similar words to the search terms. Thus, it is necessary to find and use the necessary LSI keywords in your content to improve the rankings.

Evidence That Google Uses LSI in Its Algorithm

Relevance is one of the most important factors that assists Google in determining the best result for the given search query. For returning the related results, Google understands what information the user is searching for and the intent behind their inquiry. After establishing the intent, the Google algorithm examines the web page content to analyze if it contains the relevant and necessary information for the search query.

This is where the role of LSI keywords comes into play. Find the correct and relevant LSI keywords to send a strong signal to Google. This evidence shows that Google is using LSI for ranking the search results.

LSI Keywords and Keyword Density

Keyword density is a particular keyword occurrence percentage in content. It is very significant to establish an optimal keyword density in content SEO. If you include adequate keywords in your content, search engines like Google can understand the article.

On the other hand, keyword stuffing will result in getting penalized with the over-optimization risk. The most recommended keyword density is 2 to 4% in every 100 words. Removing any keyword is easier than adding them to content. Thus, go through the entire content, check which LSI keywords are appearing infrequently, and add them.

Remove those keywords that do not make any sense or appear too many times in one paragraph. You can also improve the overall SEO score by using the LSI keywords carefully according to the keyword density rules.

How to Find LSI Keywords?

Now, the next question that might come to your mind is how to find the LSI keywords for your content. Below, we have mentioned two ways to find related keywords in your content and ensure you are discussing the right context on your page. Let us explore these techniques one by one.

1. Manual

The manual method is one way of finding semantically related keywords in content with the help of the following methods.

Through Search Engine

Google autocomplete is one of the best ways to help you find LSI keywords on a page and use them to improve your SEO. Go to Google and enter the primary keyword in the search box. But remember to avoid hitting the search button. Instead, check out the autocomplete search results. 

Related Searches

Go to Google and type the primary keyword of the page. Scroll down to the SERP page bottom, and you will encounter the searches related to the segment. You can use these keywords and search terms as an additional topic to discuss in your content. Remember to select the list of keywords similar to the content.

We have given example of LSI keywords bellow of this section.

People Also Ask

You can also go through the People Also Ask (PAA) segment to find the best LSI keywords for your web page. People Also Ask segment is a universal and interactive search result from Google, displaying a set of questions that other searches have searched for related to your query. You have to enter the primary keyword in the search box, and you can see the expansion of People Also Ask. These questions will give you outstanding ideas to use the LSI keywords vital for your content. 

2. Tools

Below, we have mentioned 4 LSI keyword tools you can use to identify the relevant keywords.

Google Keyword Research Tool

Google has one of the best tools to know about the LSI keywords, and that is none other than Google Keyword Planner. You will require a Google Adwords account to access this tool. After logging into the account, go to the Find Keywords section and then click the option of “search for new keywords using a website, phrase, or category.” Then click on the get ideas button and get a list of related keywords within no time at all!

LSI Graph

LSI graph is an LSI keyword generator without any charges. You can use it to find the LSI keywords relevant to the main keyword. Just type in the primary keyword in the search box, and a list of LSI keywords important for your page will be in front of your eyes. You can search for 20 primary keywords daily. 


In the keyword Magic Tool of SemRush, enter the primary keyword to get a list of LSI keywords. Check out the related button at the page’s top to get an idea of different LSI keywords similar to the seed keyword you have searched for. 


Ahref is another efficient tool to identify LSI keywords for a specific search term. You can get an idea of semantically related phrases with the help of search suggestions from the keyword explorer. After finding the LSI keywords, select the most vital ones depending on the content relevancy.

How to Choose the Best LSI Keywords?

Finding the LSI keyword is the simplest part. But the most difficult segment lies in selecting the best LIS keywords with maximum content relevancy and highest search volumes. Thus, understand why the user is searching for a particular information or term. You can select the most appropriate LSI terms for your content in the following ways.

1. Understand Your Content

Include LSI keywords directly related to the content. Only then will Google index and rank your web page in the SERPs. 

For instance, if you have a website offering graphic design for small businesses, you can use LSI keywords like small business graphic design, cheap graphic design for small businesses, and more. 

But should you use as many LSI keywords as possible in content?

That is completely a no! Only some keywords will naturally fit inside the content. Use only those that are meaningful and do not look forcefully inserted into the topic. Also, ensure to use the LSI keywords thoroughly throughout the entire content. 

2. Consider Search Intent

A user usually searches for the content for the following reasons.

For finding information

People often tend to know more about a particular subject. Usually, they are searching for general information.

For instance, when people search for a sports car, most of them want to know what a sports car is, what its features are, and why they might need it.


People search for transactional intent when they want to execute a particular job.

For instance, when people search for a graphic designing company, they might want to hire an agency for graphic design.


Navigational search often points to an explicit direction.

For instance, when searchers enter keywords like building a website in WordPress, they want to know the detailed process of creating a website on the WordPress platform.

3. Use Keyword Research Tools

Different keyword research tools like those mentioned above will also help you recognize the appropriate LSI keywords. The tools list the LIS keywords with lower competition and high website traffic, allowing business owners to strategize their on-page SEO efficiently. In other words, keyword research tools identify those search terms that will provide maximum benefit and ROI. 

4. Analyse Competitors

Scrutinizing the content of the rival company is another smart strategy to identify the LSI keywords to include. Assess their blogs, web content, and articles to identify the recurring search terms complementing the primary keyword. In this way, you can get an idea about the trending topics and popular keywords in your niche and develop the most engaging and relevant content accordingly.

We are intentionally not going into detail about how you can “find LSI keywords” using these tools as these tools might suggest you just need to add some terms to your site without thinking about the downsides.

Rather, We would advise you to go through all the related search queries that you see with these tools or tool functions. Decide for yourself which of these makes sense for your content.

From years of experience, We can promise you that with a little common sense, you will automatically include the majority of all content-relevant terms in your content.

An example of LSI Keyword:

If we search for “clean coffee machine” on Google.com, we see that “home remedies” is a subtopic among the related search queries.

Some SEOs might now argue that terms like “vinegar”, “baking soda”, etc. are LSI keywords.

But is that actually the case?

No, because as we now know, “LSI keywords” do not exist. Rather, such words are simply inevitable when talking about home remedies for cleaning. In other words, it is simply unavoidable from a content perspective to mention these terms. That’s why you’ll probably find these words in many of the top posts on the topic.

How to Use LSI Keywords for SEO?

You can add LSI keywords to your content and experience vital advantages for SEO in the below ways.

1. Choose the Right LSI Keywords for Your Topic

Before identifying how to include the best LSI keywords in your content, you need to select the best LSI terms according to your topic. 

For example, if you are creating a blog post with the primary keyword as SEO blog, then you can have a list of LSI keywords like:

  • Checklist for SEO blog
  • SEO blog post tips
  • SEO blog meaning
  • What are the benefits of SEO blog
  • SEO plugin for blogger
  • SEO blog for beginners
  • How to optimize your SEO blog post and more

If you want to create a blog post on the benefits of SEO blogging, then you can combine the primary keyword SEO blog with LSI keywords like ‘What are the benefits of SEO blog or SEO blog for beginners?’.

2. Monthly Search Estimate

You can check out the monthly search estimates for LSI keywords to determine if it is suitable for the content. Determine which keywords will offer the highest search for the webpage you will be creating. If you come across any LSI keyword that is not appropriate for a specific page, you can put it on a different page to boost the overall SEO.

3. Use LSI Keywords in Your Page

Add the LSI keywords to the segments where you will be adding your primary keywords like Meta description and title, HI, H2, and H3 headings, body text, and alt tags of the images. Sprinkle the related LSI words and phrases throughout the content naturally. It will extend your SEO opportunities as repeatedly using the primary keyword over and over will make it keyword stuffing.

4. Avoid Keyword Stuffing

Do not overuse the LSI keywords in content. Overstuffing the keywords will penalize the website. Use the primary keyword and the related keywords in your SEO strategy enough to clearly signal your content’s context to Google without compromising the user experience. Thus, always use LSI keywords in a natural sounding, easier, and cohesive way. It will ultimately help in improving the user experience and prevent website penalties.

Benefits of Using LSI Keywords

Including LSI keywords in the content will boost the content’s contextuality and offer numerous benefits from the SEO perspective.

1. Improved Search Engine Ranking

Using related keywords for the primary keyword within the entire content will assist the search engines in understanding the context. It will index the page and also boost its ranking power.

2. Increased Content Credibility

LSI keywords also make sure that you do not overload the content with unnecessary search terms and prevent keyword stuffing. It will also improve its credibility.

3. Reduced Bounce Rates

LSI keywords also improve various ranking factors like reduced bounce rates, users spending more time on the website and many more.

4. Better User Experience

Semantically related keywords offer outstanding user experience with the help of relevant content and information.

Difference between LSI and Long-tail Keywords?

The difference is that Long-tail keywords each come with a search intention, essentially serving as an expanded version of a primary keyword. This cannot usually be said about words that are related in terms of content (=LSI). They are primarily used for description purposes.

An example:

“Clean a sticky laptop keyboard” is a classic long-tail keyword. (A suitable short-tail keyword, i.e. with high search volume and generic intent, would be something like “clean keyboard.”) The search volume is low, but the intention behind it is very clearly recognizable.

LSI terms in such a context would be “keyboard”, “printing surface”, “keyboard processor”, “water”, etc. You would probably mention these words in an advice article anyway.

These terms might be useless as SEO perspective but very much important for content.

As a conclusion to this question we can say:

It makes sense to include both long-tail keywords and semantically related terms in an SEO content. From an SEO perspective, however, long-tail search queries have a much greater effect because these keywords are also actively searched for. This means there is an intention behind it that you can serve and thus generate traffic.


Top search engines like Google are implementing LSI keywords more for finding the context of any content piece. Thus, most online business owners are spending a lot of time learning more about the ways to leverage the LSI keywords in various content marketing campaigns and SEO strategies. Have you understood everything related to LSI keywords and how to use them? It is now time to use the above tips to rework LSI keywords and improve the content on your website.

Our final tips are:

  • Pay attention to the completeness and quality of the entire article then you will automatically include terms that are related to the content.
  • When doing the competition analysis don’t just look at the text content, but at the article as a whole. Which media are used? What does it refer to?
  • Think in Topics instead of keywords. Google does that too.
  • Write naturally instead of going through a list of words.
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