If a user enters a keyword in a search engine, in the end the SERP will be shown, the page with the results. It lists the results of the search. In Google and in many other search engines, usually the first 10 results are shown. The user finds the rest of the results on the following pages. The search engine results page (SERP) is at the same time the object of desire. Those, who are in here, can hope for many visitors. The first entry is the same as “the first address”, because there are very few people, who bother to look on the following pages for relevant websites. The ranking decides which page is the first one on the SERP. But the results can change from search engine to search engine, because of the different criteria for the ranking. The SERP can change, too, even if you search with the same keywords, if there are other websites in the same subject area. How the efforts of the owner of the webpage affect the result pages can be observed on the search for printers. If you enter the name of a printer in a search engine, which is not being produced anymore, usually you’ll find loads of websites, which offer cartridges for that kind of printer. Because of the numerous links cartridge-producers are becoming more important than the pages of the printer-producers, who might mention the machine only in some archive-list. The site of the producers plus information on the machine can be found in the following websites on the first results page of the SERP.