What are LSI keywords?

Latent semantic indexing (LSI) is a system search engines use to analyze the other words people use surrounding a given topic. LSI keywords are words and phrases with a high degree of correlation to your target topic. Google's algorithm uses them to help determine content quality and relevance to the search term.
 
LSI keywords (Latent Semantic Indexing) are keywords semantically related to your main keyword. A lot of people think that LSI keywords are synonyms. But this is incorrect. LSI keywords are simply words that are frequently found together because they share the same context.
 
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