How do search engines work?
search engines are basically computer algorithms that help users find the specific information they are looking for. With literally trillion pages of information online, without efficient search engines, it would be almost impossible to find anything on the Internet. Different search engines work in different specific ways, but all use the same basic principles.
The first thing that search engines must do to work is to create a local database basically the Internet. Early search engines only indexed keywords and site titles, but current search engines indexed all text on each page, as well as a large number of other data on the relationship of this site to other pages and in some cases all or part of the media available on the page. Search engines must index all this information so that they can start searching efficiently, rather than running the Internet every time a search query is sent.
Search engines create these databases by performing periodic PRAbout the Internet. Early search engines often required the pages to be presented to go through them, but now most of the pages are according to links from other sites. What are called robots or spiders, computer programs created for index pages, seal from page to page, recording all data on the page, and tracking each link to the new site. Different search engines restore their indices at different intervals, depending on how many spiders are constantly crawling and how quickly these spiders crawl, with some who are walking through the Internet every day or two, and others do regular renewal each week or month.
When the spider passes through these pages, it records words that finds on the site. Makes notes about how many times each word appears, whether the words are weighed in a certain way, perhaps on the basis of html, and decide how relevant words are based on links that come to the page, and on the general context of STRánky.
The search engine must then weigh the value of each page and the value of each page for the words that appear on it. This is the most complex part of what the search engine has to do, but also the most important. At the simplest level, the search engine can easily track each word on the page and record this page as relevant to searching with this keyword. For most users, however, it would not be very good, because what is required is the most important page for their search query. So different search engines come up with different ways of weighing.
Algorithms that use different search engines are well protected to prevent people from specifying pages to get better, or at least limit the level to what they can. This difference is why different search engines bring different results for the same conditions. Google could determine that one page is the best result for a search term and the query could find out that the same pageKa is not even in the TOP 50. All this is based on how they appreciate incoming and outgoing links, the densities of keywords that consider it important how they appreciate the different locations of words and any number of smaller factors.
The latest trend in search engines and probably the future of searching is to move from search based on keywords to search based on concepts. In this new form of search, rather than limiting search for keywords that enter search engines, the search machine tries to find out what these keywords mean so that it can propose pages that may not include a precise word, but are still up to date. This is still an evolving field, but it seems that it still has great potential to make searching more relevant, so the site is even easier to find exactly what you are looking for.