Ranking Search Engine It is really essential to know what is there that a search engines don't want. Or else, your faultlessly optimized site can be blacklisted. This is a high price to pay, considering that search engines account for most of new visitors to some sites. Hence, when you learn about factors that control search engine rankings, you should also learn what to evade. Major search engines have giant databases of web sites that surfers can explore by typing various keywords.
Search engines send out spiders or robots, which follow links from web sites and index all pages they come across.
Each search engine has its own formula for indexing pages; some index the whole site, while others index only the main page.
Search engines decide the amount of weight that will be placed on various factors that influence results.
Some want link popularity to be the most important criterion, while others prefer meta tags.
Search engines use a combination of factors to devise their formulas.