The algorithms of search engines like Google & Co. (1/2)
In maths, an algorithm is – in simple words – a solution scheme. Search engines including Google & Co. also use algorithms. Users enter a question and obtain a result a few seconds later. To display useful and appropriate results, the search engine must work out a “solution” (result) for the “problem” (question); this is where algorithms come into use. How they establish the order and relevance of the results depends on the rating criteria set by the respective search engine operator.
Google is the most important global search engine. This is also due to the quality of the search results in addition to user-friendliness and good performance. Google uses over 200 criteria to index a page; the good quality of the results is mainly achieved by the PageRank method.
How do Google algorithms work?The main challenge is rating the pages – this involves combining several algorithms. Algorithm developers also use the Trustrank as well as the PageRank algorithms. In both of these methods, which belong to OffPage factors, the quality of the links of a homepage are measured and evaluated. The backlinks are also taken into account. Backlinks not only take the title and age into consideration they also include position, relevance and structure. Because operators of a homepage do not have many ways of influencing these factors, Google will attach more value to the rating of a page in the years to come.
Moreover the OnPage factors play a significant role in the ratings. In addition to the page content, the internal links, loading time, location of the server, the navigation, formatting, freshness and user-friendliness all go into the rating.