Whenever you search for particular keywords in search engines, the search engine will look for related articles in the databases. This will be brought back to the users after the query is complete.
A more advanced version is to associate categories with the search terms. This will bring you more additional results which are rich in content. Along with this, you will be able to see more information on the related topic. The main advantage of using categories is that, in particular cases when the search results for a particular keyword is less, this will broaden the search. When there are too many results, you will find that the results will appear more focused to assist users, when using categories.
When this categorization works, usually the search term will be divided to check for whether they have been queried before. If it is an already queried term, the search will be simplified by assigning the already available category to this query term.
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