The main purpose of search engines is the indexing of thousands and millions of web pages. Once you look for a word or a phrase, the search engine scans automatically the entire database, where it has the stored all indexed pages and it returns to you, a list containing the most relevant results for that search. 

The only criteria the number of pages found and their relevance depend on, are the capabilities of the used search engine.

Search engines first appeared in the early 90’s when Alan ...
Continue reading ...