Search Engine refers to collecting information from the Internet according to certain strategies and using specific computer programs, and after organizing and processing the information, it provides retrieval services to users. , a system that displays relevant information retrieved by the user to the user.
Search engines include full-text indexes, directory indexes, meta search engines, vertical search engines, collection search engines, portal search engines and free link lists, etc.
So how often do search engines usually update?
Search engines basically update their web page database every day and rank each keyword every two or three days. Under normal circumstances, for a specific keyword, the search results will not suddenly find huge changes. We rarely see that the top 10 search results for a certain keyword are suddenly replaced by others, unless the search engine makes algorithm changes.
But for a specific website, if it is punished or demoted, the ranking may change dramatically overnight. We generally say that the effect of SEO is 3-6 months, but it also changes according to the specific situation.
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