Latent Semantic Indexing is a process of extorting or extracting related words from your own webpage content. This is one kind of Information Retrieval (IR) System. Major search engines are working based on latent semantic indexing (LSI) process.
Lexical indexing depends on Lexical analysis. Lexical analysis is a process of producing an output by inserting input as a sequence of characters (lexical tokens). Lexical analyzer is separated into 2 phases. First and second phases are scanner, evaluator respectively. Latent Semantic Indexing uses these two phases. LSI SEO is more complicated than normal SEO. When you search any keyword using LSI process, it displays related keyword results in a document as well as other words that are comparable to keyword search term.
LSI is based on speculation of words which have similar meanings used in same contexts. In order to determine about your website, search engines use this kind of relationships of contexts.
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