LSI Keywords

What Are LSI Keywords? The 2020 Complete LSI Guide


What is LSI?

LSI keyword FULL form

Latent semantic indexing (LSI) is a strategy used by search engines to analyze the related words (LSI Keywords) that people use for a given topic.

What are the LSI keywords?

SEO in Digital marketing

LSI words are words or phrases related to the target topic that Google’s algorithm uses to understand the content on a webpage.

What is Google’s Algorithm? – Hummingbird and Semantic Search

Hummingbird and Semantic Search

In August of 2013, Google announced the Hummingbird Algorithm, also refers as a semantic algorithm. This algorithm enhances the ability of Google to deeply understand the synonyms context of the webpage. Basically, it is the concept of improving search results by focusing on user intent.

Why Do Google Use LSI Keywords?

To enhances its ability to better understand the synonyms context of a particular webpage. So, Google uses LSI to know searcher intent.

Example Of LSI Keywords:

I searched for hair straighter in Google. It gives me suggestions but these autocomplete suggestions are not LSI words. These are the queries that people searched for more.

semantic keywords

LSI google suggestions for “hair straightener” topic are:

Wavy hair

Hair straightener brush

Fizzy hair


Flat irons 

Damaged hair

Bouncing curls

Hair tools 

What Is The Difference Between LSI Keywords and Long-Tail Keywords?

LSI KeywordsLong-Tail Keywords
1. These keywords are not the target keyword in the content.1. These keywords consist of more words with lower volume derived from a seed keyword.
2. LSI is keywords that must be in the blog to let the search engines know that your article is about the long-tail keyword that you are trying to focus on.2. Long-tail keywords lead to better conversion rates which make them easier to rank for.
3. These keywords help in improving the article ranking3. While writing content, you need to focus on a single long-tail keyword.
4. Example of LSI: If the seed keyword is Osteoarthritis, then LSI keywords are Joint, Pain, Lower back, Knees & Treatment.4. Examples of long-tail keywords: If Seed keywords are Osteoarthritis, then LONG Tail Keywords are Best Osteoarthritis Doctor, osteoarthritis treatment in Ayurveda, etc.

Why LSI Keywords Are Important In SEO?

In the old SEO keyword strategy, Search engines used to figure out the same topic-based keywords on the page.

Single keywords based SEO

If Google saw the keyword “Content Marketing” used in your content multiple times, it will consider that page is about content marketing”.

That’s why keyword density had importance in earlier SEO.

If you didn’t use it so many times, Google wouldn’t be able to understand your target topic.

But now Google has become much smarter than before. Today, Google’s goal is to figure out a page’s overall topic.

Ranking Keywords

And, now Google focuses more on LSI keywords to understand content at a deeper level.

Example- let’s suppose you published a blog on the topic “social media.

But still, Google will analyze your page to see the term “Social media” in your title tag, content, image alt text, etc.

List of LSI Keywords

And it will also scan LSI keywords like “Facebook”, “twitter”, “Snapchat” and“ Pinterest”.

Google Crawls the page

So when the search engine found LSI in your content, it will come to know that this page is about social media.”

How To Find LSI Keywords?

Ranking keywords Google Analytics

While searching for LSI terms, don’t even try to focus on synonyms. Just look for related terms and phrases.

1. Use Common Sense

The best strategy to find LSI words is common sense.
Let suppose you are writing a biographical article about Donald Trump then its worth adding part is his impeachment.

SEO Ranking Keywords

In this way, all the related words and phrases will be added.

2. Google Search – Best Terms In Google Snippet Description

Enter your target keyword into Google and look at LSI keywords in the SERP snippets.

For example, your target keyword is osteoarthritis. Look at some LSI keywords for ‘osteoarthritis’ that you can get from the top search results.

SERP Snippet Keywords

3. Google Auto Complete Results

Google Autocomplete doesn’t always show related keywords, but you will get an idea about the term.

Like, we entered the term “Osteoarthritis”.

Google’s Autocomplete generated related results; “Osteoarthritis treatment”, “Osteoarthritis causes” and “Osteoarthritis knee”.

Goolgle LSI

4. Google Related Searches

Another easiest way to find LSI from Google Search is to look at ‘Searches Related To’ at the bottom of the SERPs page:

Google Suggested Keywords

5. Google Image Tags

Google Images is an awesome feature of google that provides us every kind of image.

And it’s very beneficial.

To use this feature, you just need to enter your keyword into Google images.

LSI In Google Images

Look at the same Pinterest image suggestions:

LSI Ideas in Pinterest

6. Knowledge From Informational Sites

We have many informational websites that provide trusted information. One of the fantastic sites is Wikipedia to find related terms.

Knowledge Base Semantic Keywords

Google also extracts knowledge graph data from this popular knowledge base.

7. Google’s Knowledge Graph

Google stores the relationship information between multifarious concepts, people, and things called a knowledge graph. These results display in Google search results.

Google Graph

Try searching for your target keyword and see data that displayed on the knowledge graph.

Best Tools For Finding LSI Keywords

Free Keyword Research Tools

You can also use Free LSI Keyword Generators to get the LSI terms.

Here are some of the best LSI keywords tools:

1. Use an “LSI keyword” Tool

The keyword tool is the free SEO tool to get LSI Ideas.

LSI keyword tool

This tool can give you a myriad of suggestions related to your defined keyword. So you can easily optimize your content.

2. Ahrefs Keywords For Top Ranking Pages

Get related keywords and phrases Ideas from Ahrefs section “Also rank for”  in keyword explorer.

Keyword research Ahrefs

3. LSI Graph

LSI Graph is the best free tool for generating LSI keywords.

LSI Graph

Just enter your target keyword and scroll down to see the keywords:

Keyword Research

4. LSI Keywords Tool

Enter your seed keyword and hit ‘search’. This LSI tool returns a list of LSI keywords related to ‘tendonitis”:

LSI Keywords Free Tool

5. Ubersuggest

Another great tool for finding latent semantic indexing words. So, it gives me a plethora of LSI ideas.

Ubersuggest Keyword ideas

6. Google Keyword Planner

Find your LSI keywords using Google with its Keyword Planner Tool.

It is a free LSI keyword generator that suggests common search terms and phrases.

Enter your target term and look at keywords that have high search volume and low competition.

LSI Keywords Google

7. Keyword Explorer MOZ

Search Your Ranking keywords from MOZ. You just need to sign up & login to Moz.

Enter a target keyword in Moz Keyword explorer and you will myriad of LSI suggestions:

Keywords explorer MOZ

8. Use Alexa’s Keyword Difficulty Tool

Alexa tools can help you find related keywords to support.

Just enter your target term into the Keyword Difficulty Tool to get the report of similar words:

Alexa keyword research

How to Use LSI keywords?

Use Keywords to Boost Ranking

These LSI keywords can boost traffic and higher your article rankings in Google search results.

In addition, there are different ways to find these helpful Keywords. So, try to put them in your content at the right place.

Now you have a list of LSI Keywords.

So, How do you use them?

According to my experience, If Google finds these terms somewhere on your page, you’re good.

So, Include Your LSI Terms:

⇒ In your title tag

⇨ In image alt text

⇒ As an H2 or H3 subheading

⇨ In your H1

⇒ In the content

Final Thoughts

Latent semantic keywords are the heart of Google to understand the content. Thus, it’s important to sprinkle LSI in your content to optimize your blog.

More importantly, make sure to use them where it makes sense.

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