Latent Semantic Keywords - one of the strong factors that have been underestimated for a very long time in SEO ranking.
LSI keywords are none more than the keywords below the search results (bottom of the search page).
LSI Keywords help Google to decide your page's content & subject. And if Google can confidently grasp what your website is about it would gain you more faith, giving you credit for being important to the subject and rewarding you with an SEO lift.
These are some benefits of using LSI keywords in your article or website. It is also recommended to use LSI keywords in your Landing page of your website to rank faster.