How To Find Related Keywords (And Why You Should)

The following is a guest post by Anna Rud. Anna is a Content Marketer at Serpstat. Establishing an active presence on external resources, developing rich and quality content, implementing of brand strategy and many other are her key responsibilities.

Remember those days when keyword stuffing was a real SEO strategy? Well, those days are long gone so let’s be cheerful for that and forget it forever.

Since the quality becomes the main value in SEO, we no longer can write articles that are laden with the same keywords and, as a result, readable for the search bots alone. Sure, the article still should contain keywords but, first and foremost, it should be interesting and readable for the real person.

So how to optimize content for the search engine without compromising quality? In this post, I’ll tell how to kill these two marketing birds with one stone named LSI.

Google algorithms 101

I mentioned that keyword stuffing no longer works. Why? You haven’t asked, but I’ll answer anyway: because of Google algorithms’ updates. What are google algorithms then? Let’s figure it all out.

Imagine the situation: you’ve typed your query “Halloween hats” into the Google search box. It returns about 37 millions of results. How does it decide what sites to return, and in what order? Who is responsible for this decision? Google algorithms.

It’s a gathering of rules that you should follow to take high positions in the SERP. These algorithms are constantly updated, and it’s always kind of a talk of the town in the SEO world. Here is algorithm change history gathered by Moz — the most comprehensive list I know. Anyway, some of these updates turned the game upside down such as Panda and Hummingbird. These two are responsible for LSI.

Google does understand you!

LSI or Latent Semantic Indexing is an indexing method which is capable of identifying patterns between the terms and concepts. Put simply, it can understand the context of the page. Google finds these patterns and understands that words that are used in the same contexts usually have similar meanings. I’ll try to explain it with the examples.

We’re typing into the Google search box some query, for instance, “windows.” It has several meanings:

  • Microsoft Windows
  • Film
  • House windows
  • Old jazz band
  • And more

Other examples can be Doors — house doors, band; cars — cartoon, vehicle, band. Even if you type LSI into the Google search box, you’ll find a lot of abbreviations:

Since Google strives to show the most relevant results to the user’s query, its algorithms pay attention to the context of the page, as I said earlier. Thus, here are LSI keywords for each meaning:

  • Film — film, movie, film 1980, imdb, watch, cast, characters, online, etc.
  • Band — band, jazz, song, album, lyrics, youtube, drive, singer, etc.
  • Microsoft Windows — Microsoft, soft, operating system, Windows 7, download, laptop, PC, etc.
  • House windows — house, home, types, for sale, design, replacement, cost, etc.

It means that Google decides what results to show depending on related phrases.

Thus, LSI keywords are keywords semantically related to your primary keyword. Google shows it in bold text when you’re typing your query into the search box:

Also, you’ll see it at the bottom of the page:

LSI vs. SEO text

There are still some texts like this on the Internet:

Some say that such strategy simply won’t bring any results, others say that it can even harm your site rankings. But one thing that is clear to me — this text is difficult to read. SEO texts are totally ok as long as you’re not overdoing it.

LSI texts are based on the whole subject, natural word forms, synonyms, phrases which are semantically related to the product/service/topic. They are useful to:

  • Use more keywords without being spammy;
  • Optimize your text for the google search so that it remains readable for the reader;
  • Make your text as relevant as possible;
  • As a result, reduce bounce rate and increase time users spend on site;
  • Rank for the whole list of keywords, not only for the single one;
  • Be sure you won’t get penalized using this strategy.

Tools to find it

Of course, when you’re writing a text about sports cars, you’ll probably use phrases like sport, car, road, model, speed, automobile, racing, etc. But even so, sometimes it’s not enough. We’re lucky enough to have a lot of tools that help to find a lot of LSI keywords in few clicks.

Keyword planner

Go to “Keyword ideas” at Keyword planner and check if there is something that fits your article. You can see average monthly searches and keyword competition. The last metric is quite important as sometimes too competitive keywords aren’t worth efforts. Mix high competitive keywords with middle and low ones.


Serpstat is an all-in-one SEO platform consists of 5 features. We’ll go with “related keywords” module:

Related Keywords feature returns a list of all keywords semantically related to the researched query. It means that there are at least two identical pages in top 20 search results for the researched query and its related keyword, where connection strength — the number of identical URLs in search results.

You can export all of them to Exel or Google spreadsheets, analyze and then naturally insert it your post.

LSI Graph

This tool is designed precisely to gather LSI keywords, so it’s the simplest tool with the only one feature.

Just type your primary keyword into the search box and get a bunch of new keywords for your content.  


This tool finds a lot of LSI keywords and searches questions. The results are sorted by prepositions, questions, comparisons, and alphabet.

It also paints exciting reports with the great visualization.

What’s next?

You can use LSI keywords in:

  • Headers (h1-h6) and meta tags (Title, Description);
  • image names and alt-attribute;
  • the text around incoming, outcoming links
  • the lead paragraph and at the end of the article
  • as the anchor of incoming links
  • the body of the text.

Most importantly:

  • being carried away by the process, do not ignore your primary keyword;
  • write so that LSI keywords look naturally and try not to overdo it.

That’s it! It’s just another way to improve your content and rank higher. Try it and draw your own conclusions.Writing for SEO? Great. But: You are still writing for people. Related keywords help to optimize for search without sounding like an overoptimized robot. keyword research, keywords, keyword optimization, seo, seo keywords, keyword tools, keyword research