Understanding the working of search engine

Technically speaking, the searches made on the Internet are text driven. Whenever we look for something on the net (in the form of text) search engine crawls over the web and in order to deliver the relevant information from the back end search engines frequently performs the following tasks to update its database regularly- crawling, indexing, processing, calculating relevancy, and recover. Let us see how each step is performed.

Crawling:

Search tools crawl into the Web to see what new arrives. This task is performed by a bit of programming, called a crawler or spider. Spider follow links starting with one page then onto the next and list all that they find on their way. Here, one thing is to be noted that due to the heavy quantity of pages on the Web it is incomprehensible for the spider to visit a website daily just to check whether another page has been added or if a current page has been altered. At times, crawlers may not visit your web page for a month or two.

Indexing:

After a page has crept, the next step is to index its content. The listed page is put away in a goliath database, from where it can later be recovered. Basically, the procedure of indexing is recognizing the words and expressions that best portray the page and relegating the page to specific watchwords.

Processing: 

Now when the query is made, the search engine starts its search. It means it starts analyzing the inquiry string in the seek demand with the indexed pages in the database.

Calculating relevance:

Since it is likely that more than one page (basically it is millions of pages) contains the pursuit string, the spider begins computing the significance of each of the pages in its record with the hunt string.

Recovering: 

The last stride in internet searchers' movement is recovering the outcomes. Essentially, it is just basically showing them in the program – that is, the unlimited pages of indexed lists that are sorted from the most significant to the least important ones.

Well, this process may seem a lengthy one as the number of pages on the internet is in millions; the searches get the result in a fraction of seconds. Once understanding the process and its complexities, it is crucial for the website and its pages to have relevant keywords and must be active at all times so that whenever the spider crawls, the information of the page is indexed and available on the top of the list when the relevant search is made.