With so much emphasis placed on search engine optimization, many webmasters forget the dangers of over-optimization. 
Overusing your keyword in your copy not only can begin to look forced and awkward for the reader rather quickly, but search engines aren’t too fond of it, either (more on this later).
Fortunately, there is a better alternative in something called LSI keywords which not only reads better but gives you a chance to rank for additional keywords, as well.
In this article, we’ll give the LSI keywords definition and talk about why you ought to use them in your content.
LSI Keywords Definition
LSI keywords (Latent Semantic Indexing) are simply synonyms or related keywords. It is one of the ranking factors used by Google because it looks more natural to use different versions of the same word instead of repeating the same keyword.
Repeating the same keyword over and over on your page in order to get a better ranking, known as keyword stuffing, no longer works like it used to and can negatively effect your ranking with search engines because it looks calculating and fake.
It is much more effective to use variations of your keyword, sprinkled in organically alongside your main keyword, in your content. This looks better for your readers and looks better for search engines while giving them a better idea of what your content is about without looking like you’re trying to game the system.
A combination of common sense when coming up with LSI keywords based on your main keyword and a keyword research 
tool will benefit you. Market Samurai is one such tool that is free and can give you up to 800 related keywords to your initial search, many being LSI keywords that you can use in your content alongside your keyword.
A side benefit of this is that, depending on a number of factors, it also gives you a chance to rank for the variations of the keyword in the SERPs which will net you even more traffic.
It’s important to keep in mind that your main keyword is the priority because this is the keyword you are trying to rank for, so use H1 tags when applicable.