How Search Engines Work

Unlike humans, search engines are text-driven. Although technology advances rapidly, search engines are far from intelligent creatures who can feel the beauty of design blogs. Instead, search engines crawl the web, look at a particular site items (mainly text) to get the contents of each site. This brief explanation is not the most appropriate because, as we will see next, search engines perform several activities in order to deliver search results - crawling, indexing, processing, calculating relevancy, and take.
First, search engines crawl the web to see what is there. This task is performed by some of the software, called a crawler or a spider (or Googlebot, as is the case with Google). Spiders follow links from one page to another, it is impossible for the spiders to visit the site every day just to see if a new page has appeared or if there is a page that has been modified. Sometimes crawlers will not visit your site for a month or two, so far your SEO efforts will not dihargai.Pada sperti this moment, we can only wait.
Once the page is crawled, the next step is to index the contents. Indexed pages are stored in a giant database, which will one day in tampilkan.jika you help them to optimize it, it will be easier for them to classify your pages correctly and to get a higher ranking.
When it comes the search query, the search engine process - ie, comparing the search string in the search query with the indexed pages in the database. Because there is a possibility that more than one page (practically it is millions of pages) containing the search string, the search engine starts calculating the relevance of each page in a searchable index for strings.
There are various algorithms to calculate relevancy. Each algorithm has different relative weights for common factors like keyword density, link, or metatags. That is why different search engines deliver search results pages for the same string but different results. Moreover note that all the major search engines, like Yahoo, Google, MSN, etc. periodically change their algorithms, and if you want to remain at the top, you also need to customize your pages to the latest changes.