What is Latent Semantic Indexing? Things You Need To Know

What is Latent Semantic Indexing?

Latent Semantic Indexing in short also called LSI. These are the keywords which are semantically ( with regard to meaning) related to the primary keywords not the synonyms or meanings of the primary keywords.

It is a ranking factor used to measure the page relevancy.

In order to get a better rank, a page’s content should contain a magnificent meaning. LSI was introduced in order to replace keyword stuffing so that search engines won’t focus on the keywords but on the content and its contextual meaning.

Latent Semantic Indexing is used by search engines in order to find similar keywords and their synonyms so that the search results are just accurate.

Google ranks those web pages higher which contain LSI keywords when compared to others without them.

Usage of this indexing technique leads to content creation in a conversational way. It also prevents overstuffing the content with the same keywords which makes it unreadable for the readers.

LSI ensures that the user always gets the right information instead of misleading websites.

They also get quicker search results because of these keywords. The final output is more traffic to the businesses.

For instance, the keyword “Amazon” will include websites which include the river Amazon or the Amazon forests or even the e-commerce giant. This is where LSI comes into use.

The search engines use the LSI keywords in order to add context to webpages containing the term “Amazon” to improve the search results. The LSI keywords can be “Amazon shopping”, “online shopping”, “longest river”, “evergreen forests”.

Latent Semantic Indexing Example:

It is considered that all keywords ranked by latent semantic indexing are synonyms. However, this is not the case. Those are the words that relate to each other in a greater context of the page.

We can take an example of this article, you may find keywords which are semantically related such as – SEO strategy, keyword stuffing, search terms, intent, SERPs. These can’t be called synonyms because they can’t be replaced using the others.

Thus, LSI is all about using strategic keywords together so that they provide relevant information about a larger topic.

In this example, the bigger picture is the SEO strategy. If you search for LSI keywords, Latent Semantic Indexing meaning or LSI keywords example or Latent Semantic Indexing examples, you will get almost the same search results in Google.

Latent Semantic Indexing SEO example:

Latent Semantic Indexing SEOs helps to provide good user experience by related search results instead of pages which are not related to the keyword at all.

For example, when you search for “hotels near Juhu” on Google and you will get accurate results showing up the hotel found near the Juhu beach in Mumbai.

Another SEO example can be this article which is Latent Semantic indexing – Why does it matter for your SEO.

Your prime keyword is “Latent Semantic Indexing importance in SEO”. And the LSI keywords for this article can be “LSI importance in SEO”, “Latent Semantic Indexing matter SEO”, etc.

So once we finish writing this article, we will ensure that related terms like SEO, keyword stuffing, SEO strategy, LSI keywords, and LSI tools are included. These related terms serve the purpose of content relevancy.

However, if you put terms like “does not matter” “hashing”, Google will think that the article is about Semantic Hashing Analysis or LSA instead of LSI.

Latent Semantic Indexing Tools:

SERP Stat Keyword Research Tool:

This is a free tool. This is very much alike to Google’s Keyword Planner.

All you got to do is type in your search query and this database tool will show up all related search results on the basis of search volumes and CPC (Cost Per Click).

Keywords Suggestion Tool:

This free tool provides the most used words used in your business. This is your start point before building your content and choosing the apt words.

The Keyword suggestion tool provides a better page rank and organic traffic growth as well which will make your task easier.

LSI Graph Keywords Tool:

This free tool provides synonyms of your main or primary keywords. The graph keywords tool uses a formula to leverage the prime keywords. Thus, allowing you to have a huge collection of search terms which will be appealing to users and also establish you different than your competitors.

This tool is quicker in generating the phrases or search terms which are commonly used. This will help you include those terms in your content.

Besides being quick, this tool has a user – friendly interface making it easy to use. For any business or new webmasters, this tool will be great.

Niche Laboratory:

This freebie is brought into use when you require new ideas built around your prime keyword.

Once you type in the main keyword, niche laboratory will display a bunch of handy information about it i.e. an outline or analysis of the keyword.

The results include common phrases related to it forming a visual word cloud. This will help you decide which words to use more in your articles or blogs or posts.

This is a free tool as well which also gives you a list of best 10 websites in that sector along with their meta description, keyword tags.

Ubersuggest LSI keywords Research Tool:

Ubersuggest can be useful to find keywords which usually don’t show up in the Google Keyword Planner. This freebie helps you search keyword ideas for SEO, digital marketing drive, PPC (Pay Per Click) advertising models, posts, or the homepage of your website.

The working process includes typing in the keyword and you will get a search result of related queries based on volume, difficulty, and CPC.

This type of segmented searching is to look for articles, visual images, online shopping options, online videos, and broadcast news.

This is a multilingual tool which makes it popular among users. Besides, multi-lingual support, it also has the feature to filter the results.

For example, if you searched for “pet grooming”, it will return “pet grooming near you”, “pet groomers”. You may then filter these results by “groomers” and then the tool will minimize the search range and show you results containing pet grooming services around you or in your city.

The keywords can be saved for later use in a CSV file or copied to some other location as well.

Ultimate Keyword Hunter:

This free tool helps you built content which will rank high and also quality keywords.

It has other filters as well as the number of search results per page, number of words in a phrase which gives you a similar working mechanism of a search engine.

The keyword semantics are calculated on the basis of the target audience so that the user is able to attract his potential customers through his content.

You can also filter and sort the output by the number of sites or the total count of sites which contain your primary keyword.

The best feature is its importing feature which imports the terms so as to analyze the content on the basis of main keywords specified and other filters chosen.

SEOPressor WordPress Plugin:

It is a Plugin by WordPress and it enables you to optimize your website through great inputs. All of these inputs are shown under one control panel.

This plugin helps you calculate the website intelligence; segment your content on the basis of particular data collected from blog posts, webpages or user reviews.

Latent Semantic Indexing keywords research:

This freebie is best known due to its website analysis feature. This tool will analyze your website for any errors and then notify you on those sections which require optimization.

The maximum keyword count is 3 i.e. the software can use only up to 3 keywords to check for optimization. After which, you will get suggestions on how to fix those sections which are not optimized.

After successful optimization, you may consider using the SEOPRessor WordPress plugin to calculate the Latent Semantic Indexing of the page.

Google Keyword Planner:

This is the best tool for LSI. This keeps you aloft the keywords trends related to your main keyword. This will help you achieve related content.

Once you search for certain products or services your business might provide, the tool will suggest you all those related keywords which are important to your sector.

After which, you may choose the keywords which you prefer and include them in your content. Below are the steps to work on this free tool from Google:

  • Go to Google AdWords account and log into your account.
  • Click on the stacked dot icon. This will open the drop-down menu.
  • Click “Keyword Planner” present in the far left of the menu.
  • Select “Search for new keywords using a phrase, website or category”.
  • Enter your desired keyword in the “Your product or service” text box,
  • Click the “Get ideas” button.

This will immediately give you a list of related keywords and phrase that too which Google links to your main keyword.


The best feature is the “Keyword Research” tool. You can begin by typing in your primary keyword and then click on the “Try It” button. This will give you a list of similar phrases, keywords, and keyword metrics.

Next, click “View full report” from the “Phrase Match Keywords” section. The full report comprises thousands of related keyword phrases that will help you improve the relevancy of your website content or blog post.

Using Latent Semantic Indexing to boost your SEO strategy:

The best ways to boost your SEO strategy is by following these steps:

  • Expanding your search range beyond the top searched keywords
  • Including long-tail keywords in your content strategy
  • Focusing on how to answer your most important client’s search intent
  • Considering similar topics to your main keyword instead of considering the same keyword phrases

This will help you improve the conversion rate. In other words, you can have the potential customers make a sale on your website using Latent Semantic Indexing.

Besides conversion rates, the LSI keywords also will improve your SERPs (Search Engine Ranking Page) and move up the competition ladder.

One of the simplest ways to find LSI keywords is using a Google search to find out which keywords are related to your main keyword. This is the best way because you get to know what almost most of the online audience is viewing on Google.

It shows up all the related links to that keyword or certain phrase and you discover your page ranking in a quick minute.

The next big task for you is to use those LSI keywords in your post. Include all those related semantics into your content and you are set to boost your SEO for the website.

Below are the best places to place LSI keywords in your post:

  • Title tag or page title
  • H1 and H2 tags
  • Meta Tags
  • Anchor tags (where you use hyperlinks)
  • Alt text or Alt attribute of Image tags
  • Captions for your images
  • URL address
  • The first paragraph of the article
  • Last paragraph of the article

Before starting content creation, you should think about your audience, the type of audience, the reason you’re writing the post, the solutions to the reader’s problems, and the outcome of your blog.

These are the questions you should ask yourself before content creation:

  • The search intent
  • Related keywords
  • How related are the keywords to your content

This will help you attract the attention of your readers and become a strong competitor. Here are a few SEO usage tips for all the new businesses out there:

  • Avoid overusing the keywords.
  • Try replacing the primary keyword with LSI keywords.
  • Use one keyword for around every 200 – 300 words on your post.
  • Double check with Google Webmaster tools in order to know the popular keywords.
  • Build your content naturally, topically.

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