How does Search engine works ? SEO
By Abdul Shaikh :-
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SEO stands for Search Engine Optimization.
Seo is a subset of search engine marketing. SEO is also referred as SEO copyrighting,
because most of the techniques that are used to promote sites in search engines, deal
with text.
If you plan to do some basic SEO, it is essential that you understand how search engines
work.
How does search engine works ?
Search engines perform several activities in order to deliver search results.
crawling - Process of fetching all the web pages linked to a website. This task is
performed by a software called a crawler or a spider (or Googlebot, in case of
Google).
indexing - Process of creating index for all the fetched web pages and keeping
them into a giant database from where it can later be retrieved. Essentially, the
process of indexing is identifying the words and expressions that best describe the
page and assigning the page to particular keywords.
processing - When a search request comes, the search engine processes it, i.e.,
it compares the search string in the search request with the indexed pages in the
database.
calculating relevance - It is likely that more than one page contains the search
string, so the search engine starts calculating the relevancy of each of the pages
in its index to the search string.
returning results - The last step in search engine activities is retrieving the best
matched results. Basically, it is nothing more than simply displaying them in the
browser.
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