Search engines - Google

Google is, as already described, an Internet search engine, which in 1998 by Larry Page and Sergey Brin was developed. The origin of the word Google is in the 1938 invented by Milton Sirotta expression `googol ', which for a one with a hundred zeros. The founders of the search engine and the same firm Google Inc. chose this phrase in reference to the unimaginable size of the Internet. In 2005, even the Duden the verb `Googling 'in his words.

Meanwhile, Google Inc. is one of the world's most influential companies. With a market value of more than 150 billion US dollars, the two founders, at the latest after the IPO in August 2004, with the richest men in the world. They employ more than 10,000 employees. Google Inc. The company operates worldwide many data centers. A query to optimize search speed, always to the nearest computer center. Only in this way can answer periods of a few tenths of a second guaranteed.

The listing of search results, so the ranking, according to a specific algorithm, which is constantly expanded and verified. One of the most important criteria by which the results are sorted, the PageRank. The PageRank defines the `value 'of a Web page based on the number and quality of incoming links. This value is in a scale from 1 to 10. Other more or less important criteria include The content and relevance of a page, the domain name, Title and Description tag, the structure of content, outbound links, old texts, the listing of some major Webkatalogen (DMOZ), the age of a page, and many more .

Experts estimate that the Google algorithm from several hundred individual elements. Because Google with over 90% market leader among search services, they need many of these criteria for a search engine optimization taken into account. For this reason, most of these factors in the course of the tutorial explicitly explained ...