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— index [2014/08/11 13:27] (current)
stephan created
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 +====== Index ======
  
 +----
 +
 +===== Definition =====
 +
 +An **index** is a list of things used to guide users.
 +
 +In connection with search engines, the index is a list of [[web pages]] whose [[keyword|keywords]] are relevant to the search query. There are two types of indexes, the //organic// index and the //paid// index.
 +
 +==== Organic Index ====
 +
 +The organic index is created by the search engine'​s own algorithm after [[crawler|crawlers]] analyzed the websites. The higher the ranking of a website is, the higher it will be positioned in the search results.
 +
 +==== Paid Index ====
 +
 +The paid index is the payable version of the organic index. Webmasters can use it to advertise their website. The results from the paid index are usually displayed above the results from the organic index.
 +
 +---- 
 +
 +===== Importance for SEO =====
 +
 +An index can help users to orientate themselves, they will find quicker what they are looking for.
 +
 +SEO means trying to optimize a website for the organic index and to improve the positioning of the website in the [[SERP]]s.