How major search engines decide their ranking list?
You cannot pay a search engine for a high ranking in their search engine result page. You can only achieve a high ranking if your web site having good quality of relevant content and having a SEO friendly coding structure as per search engine guidelines. Search engines identify relevant content for their search results by sending out ‘spiders’ or ‘robots’ which ‘crawl’ (analyze) your site and ‘index’ (record) its details. Complex algorithms are then employed to determine whether your site is useful and should be included in the search engine’s search results.