LSI keywords are these words semantically related in other words from a text published on the Internet. LSI is short for Latent Semantic Indexing, translated into Spanish as Latent Semantic Indexing, a mathematical system that Google has been using to retrieve and index documents since 2014, mainly to distinguish one piece of content from another based on your context in relation to SEO positioning.
LSI keywords enable search engines to semantically understand content and display related results on their pages
Thanks to LSI, Google can identify user searches much faster. In fact, implementing this system has favored a change in the way users search on Google, as 15% of daily searches on Google are terms that have never been used before.
LSI keywords enable the search engine Find related results these new ways of searching. In terms of SEO, LSI keywords are words that relate to the main keyword and allow you to add more context to the content to make it easier to find Google and users.
In the picture below, you can see how the “google spiders” extract the relationship between the main keywords and their relationship to the content:
While some LSI keywords can be synonymous, not all are. Most of them are words or expressions that are closely related to the term. While using synonyms is good SEO practice, it is about something completely different. For example, the synonym for a jacket could be windbreaker, while the LSI words for jacket are: reversible, down, midseason, warm and so on.
One of the main benefits of using LSI keywords is that they improve the page’s SEO and allow search engines to understand your content and position it properly. They also improve the relevance of the content as you can avoid that Keyword filling, a bad practice of Black Hat SEO and also allows you to increase the number of search results as the content appears in direct searches as well as related searches.