The majority of Internet users believe to actively control their search on Google. Many people do not know that the search engine made a selection long before you entered your search. Google has various ranking systems that search several billion websites within a few seconds in order to provide users with the most relevant answers to their search queries. The system performs a practical word analysis for this purpose. Numerous language models decipher the meaning of the entered terms and browse the search index for the desired words. Clever search algorithms in combination with the mentioned language models take over these tasks.

Nowadays, Google not only detects spelling mistakes, but also helps users solve complicated tasks by assigning the type of search query to a specific category. The search engine uses a system for synonyms. The term synonym stands for a word that has several meanings. The Google system mentioned, understands what the user is looking for, even if the search term entered has several meanings. Computer scientists have invested more than half a decade in the development of this system. Their efforts have paid off, however, with search results improving by more than 30 percent. In addition, the Google search algorithm differentiates whether the query is a specific term or a general question. Some terms are ambiguous such as "helter skelter" where some like "SEO Leeds" or "SEO Agency" are not. The search engine looks for words that provide valuable clues. These include pictures, reviews and opening hours. In addition, the algorithms can differentiate whether the user is looking for today’s results or rather looking for information about an organization located in his environment.

The term “crawling” comes from English and in this context stands for the “rolling” of a synchronous and asynchronous machine. The so- called web crawler bundles information from several billion websites, which it chronologically arranges in Google’s index according to their relevance within a few seconds.

The process starts with an enumeration of different websites of the former crawlings and sitemaps, which were submitted by homepage owners. In the first step, the crawlers call the Web pages and then follow the links to the relevant pages. In addition, the task of the software is to check whether more up-to-date websites are available, whether significant changes have been made to the existing websites and whether obsolete links are represented. In addition, the special crawling software determines which websites it searches, when and how often. It also determines how many of the numerous subpages of the respective website it calls up.

The Google Search Console includes several webmaster tools. These allow website developers to determine exactly how Google should crawl their site. They give specific information to the respective sides of their homepage.

Furthermore, they can ask Google to crawl their URLs again or, if they wish, prevent the crawling of their website. The search engine does not demand any monetary consideration from the users in order to “crawl” their homepages more often. It offers all website owners the same tools to ensure the best possible search results for users.

The Internet symbolizes a virtual library. Experts speak of a lending library with several billion books that is growing daily, but which is not subject to a central catalog system. For this reason, the web crawler searches for special software and websites that are accessible to the general public. The so-called crawlers go to their selected pages and visit the placed links. The process can be levelled with conventional Internet surfing. The crawlers jump from one link to another. They then send the relevant information to the Google servers.