How does Search Engine index a Website

[Zinavocouk]

 There are basically three ways to get your site listed in a search engine:
- Submit your site directly to the search engine using a free submit form.
- Let the search engine find your site through links to site from other sites such as directories.
- Pay the search engine to index your sites.

[adlerdale]

Search engine indexing is done when the web crawler collects the detailed information about the website and then analyses the whole information. Then the indexed data is encoded and stored  on storage space. Search engine then searches its data the user requested and displays the results.

[cwvps]

Because search engines like showing users the sites that they think the users will find useful, to ensure your site will be indexed is to create good, informative content and update your site frequently. It takes some time for new sites to be crawled and indexed and this may take from few weeks to a few months. To speed the process, it is recommended to submit a site to Google through Google Webmaster Tools, build backlinks to a website, submit articles to article directories and build authority in your niche.

[dexterousweb]

Search Engine index a website only they can access a page and parse its contents.

[saanvikadam]

Googlebot processes each of the pages it crawls in order to compile a massive index of all the words it sees and their location on each page. In addition, we process information included in key content tags and attributes, such as Title tags and ALT attributes. Googlebot can process many, but not all, content types. For example, we cannot process the content of some rich media files or dynamic pages.

[TomClarke]

To a search engine, relevance means more than finding a page  with the right words. Earlier,  search engines didn't go much further than this simplistic step, and search results were of limited value. Over the years, smart engineers have devised better ways to match results to searchers' queris. Nowadays, hundreds of factors influence  relvance.
Search engines typically assume that the more  popular a site, page, or dоcument, th emore valuable  the information it contains  must be. This assumption has proven  fairly successful in terms of user satisfaction with search results.
Popularity and relevance aren't determined manually. Instead, the engines employ  mathematical equations  (algorithms) to sort the wheat from the chaff (relevance), and then to rank the wheat in order of quality (popularity).