What is LSI?

LSI (Latent Semantic Indexing) is based on the principle that words that are used in the same contexts tend to have similar meanings. It is a mathematical calculation that can be used by search engines to determine the relevance of content to the keywords being searched on, in an attempt to reduce spam sites and allow search bots to view web pages in a more human way.
 
Latent semantic indexing keywords, or LSI keywords is really just a dressed up name for synonyms or related keywords. LSI stands for Latent Semantic Indexing but let’s not get complicated about this. In simple terms it is just how Google decides what your page is about. We all know about main keywords and anchor text links but these little guys are really important. Think about it, they are how Google decides what your page is about.
 
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