( niGraphic ) { web design & photography }

To understand SEO you need to be aware of the architecture of search engines. They all contain the following main components:

   Spider - a browser-like program that downloads web pages.

   Crawler – a program that automatically follows all of the links on each web page.

   Indexer - a program that analyzes web pages downloaded by the spider and the crawler.

   Database– storage for downloaded and processed pages.

   Results engine – extracts search results from the database.

   Web server – a server that is responsible for interaction between the user and other search engine components.