CHAPTER 1: HOW SEARCH ENGINES OPERATE
Search engines essentially do two things.
Below we will also talk about how a search engine determines what is relevant and popular.
Crawling And Indexings
By establishing huge data centres all over the world, search engine companies are able to hold metadata on all of the billions of pages the crawlers find, in an index. When they find these pages, they decipher the code and store certain data on the pages in these datacentres so that it can be easily accessed almost instantaneously. The speed with which the engines do this is extremely important, because when a person does a search they want their results as quickly as possible. Even a delay of a second or two can cause them to be upset.
Have No Fear, Fellow Search Marketer!
Search engine marketers have found different ways over the last fifteen or more years to influence how their sites are ranked on search engines. They use this information to help their clients figure out ways to achieve a better ranking.