Viewing of the modifications made to the web site in the engines

Periodically the spider softwares, used by the search engines to index the web sites, return to “visit” the web site, updating the record in the database with the modifications made to the web site and therefore regulating the way in which it appears among the search results. The time it takes to update the database varies from engine to engine and can take from 2 to 10 or more weeks.