LSI stands for “latent semantic indexing,” and this is one of the most popular tools for identifying related keywords and phrases. You can input a specific topic and receive keyword lists for single-word, two-word and three-word keyword phrases that frequently appear together in clusters.
One of the most useful elements of LSI is the ability to search for keyword phrases within specific Google rankings. So you can easily use this tool to compare the phrases in the top result against those in the top five or 10 Google results. That can help make it clear what the general related keywords are and what words might be more specifically related to a particular website.
In the past, LSI Keywords and its related service, ThemeWriters, was used to create targeted articles for SEO purposes. The idea was to identify several valuable keywords and cram them into an article to boost a page’s rank for that keyword. Today, this type of keyword stuffing will cause more harm than good.
Instead, you should look at LSI Keywords as a tool for inspiration. Rather than trying to stuff a list of keywords into every piece of content you write, you should look at the listed words and phrases as a whole to see what relationship they have to one another. Use this to inspire your own content by giving you an idea of what major points should be addressed within an article on that topic.