In this article, you will find the answer of very important question for each internet user: “How does a search engine work?”
Although each search engine has its own software program, the way it works is very similar. They all perform three tasks. In the first, it examines the content to be learned and allowed to see. This is called browsing). In the second, it categorizes each piece of content. This is called indexing. And third, he decides which content is most useful to the searcher. This is called ranking.
Let’s take a closer look at how a search engine works.
How a search engine works:
Search engines “crawl’ the Internet and discover contents such as web pages, images, and videos. All search engines use computer programs called “browsers ”, “ spiders”and “bot” in order to access pages.
Bots jump from one page to another by following links that lead to other pages. These bots don’t know where to stop. Their sole purpose is to constantly visit the page and search for new links and content to index.
Indexing is the second part of the process. The directory consists of an enormous list of web pages and contents found by bots. The search engine uses this index as the source of information displayed on the search results pages. However, not everything that bots find can be found in the search engine’s index. For example, search engines can find many copies of a single content on different websites.
How is that possible? Imagine you’re looking for a coffee machine instead of a coffee shop. You may notice that the first-class X-brand coffee machine product description is literally the same on most major vendors’ websites. This definition may be made by the manufacturer, but the search engine must decide which version to keep in the directory. Since there is no need to have hundreds of copies, it is not possible to add each page. Therefore, if you have a website where you sell a coffee machine, it is better to write a unique definition for the X brand coffee machine.
Does that make sense?
Now that we’ve gone through the scanning and indexing processes, but the sorting remains. When you enter a search query, the engine attempts to obtain matching results by comparing the index of the words and phrases you are using. For example, suppose the search engine found 230 million matching results. Now it’s time for the search engine’s last task, ranking.
The search engines’ method of ranking pages is highly confidential, as they are their special sauce. Search engines use hundreds of different elements to determine ranking, such as words on the page, the number of other websites linked to the page, and the novelty of content.
However, regardless of the formula they use to determine the order, the goal does not change: making a connection between the searcher and what he is looking for.