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
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
Calculating Relevancy – 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.
Retrieving Results – The last step in search engine activities is retrieving the best
matched results. Basically, social media manager do it is nothing more than simply displaying them in the
Search engines such as Google and Yahoo! often update their relevancy algorithm dozens
of times per month. When you see changes in your rankings, it is due to an algorithmic
shift or something else beyond your control.
Although the basic principle of operation of all search engines is the same, the minor
differences between their relevancy algorithms lead to major changes in the relevancy of