an alphabetical list of words relating to a specific subject, text, or dialect.
Latent Semantic Indexing (LSI) is the process of retrieving and indexing online content based on smart keyword research. LSI results are driven by looking through each document for the theme, keywords, related terms, and phrases. Documents that have many words in common are semantically close, those that have few words in common are semantically distant. A site's central themes and not any specific keywords form the foundation of its LSI.
LSI looks for synonyms related to the title of your page. Each piece of content is evaluated solely on the commonality of terms and themes between documents; based on this analysis, the content is put in a set of documents or put aside.
The objective of LSI is to tell the Google spider how to index your content based on the intent.
LSI can improve your search rankings when you help Google understand the topic you’re writing about and how it is relevant to the search query.
LSI do's include use of keywords in the content (primary, secondary, and synonyms), page title, and heading tags.
Ex:Suggested key phrases in google organic search displayed at the bottom of the page.