How Search Engines Work

One of the facts about search engines is that they utilize software programs known as bots or spiders that crawl the web and build their database. These spiders are sent to view and index pages which are later processed and retrieved from the database. If ranking on top of the search engine results pages (SERPs) is crucial for you, then it is important you understand the basics of creating a search engine-friendly website.

Below it is explained in detail how a search engine works.

Crawling firstly, search engines crawl the web to gather information and build their database. This is done by an automated software called a search engine crawler or spider or bot. These spiders crawl through a site and look at the content (mainly text) to know what the site is about and then start collecting, parsing, and storing the data so that it can be easily be retrieved from its database.

However, since there are over billion pages on the web, it is practically impossible for a spider to revisit a site on a daily basis only to see if a new page has been added or an existing page has gone through any modification. Many times the spider may not visit your website for a month or more also, therefore, the true impact of SEO efforts cannot be known immediately.

It is also good to know that search engines are mainly text-driven and are oblivious to images, sounds, flash movies, java scripts, Javascripts, frames, directories, and similar stuff. Therefore having lots of these on your website may not be very helpful from the SEO point of view as these will not be crawled and indexed for further processing.

Search engine indexing once a page is crawled, the next step involves indexing the content. This process entails finding those words that can best describe the webpage content and then assigning the webpage to specific keywords. The indexed page is then stored in the huge database for retrieval later. At times, the search engine may not be able to correctly identify the meaning of the page and in such a case optimization of the page can help it classify it rightly and achieve a better ranking for you.

Processing this is done when a user enters a search query – in simple terms, the search engine analyses the information it has indexed in relation to the search request. Since there will be millions of pages containing the same search term, the search engine calculates the relevance of each page in its database to the search query.

The relevancy of a page is calculated based on various algorithms. These algorithms assign different weights for general aspects like Meta Tags, Keyword Density, and Links. However, one basic truth that you need to know is that all major search engines regularly change their algorithms and if you want to continue to appear on the top of the search results, you need to keep your pages up to date and have them optimized for the latest changes. Also supporting SEO efforts are the links from other websites that point to your website. These links will be from sites that are highly ranked themselves and the higher the ranking of the sites that point to your site, the better your search engine’s ranking will be.

Retrieving this is the last step in the search engine optimization process and involves retrieving the results, that is, pulling out information from the database. This will ensure that all relevant information has been collected and made available to you.

There are two ways of searching for information on the internet. Either you search manually or you use a search engine. Usually, most people opt for the latter as it is quicker and easier.

However, if you compare the amount of time it takes to search and the amount of information available, there is a major difference between the two. Sorting requires picking out specific details from the available information and this is done by picking out those keywords that are relevant, however, the amount of available information is far greater.

Without a search engine to help you, all your SEO efforts are in vain. Your website is just sitting in a dark room on the world wide web, waiting to be discovered by the right people. Even if your site is designed perfectly, it is still necessary to promote and promote your site to make it available to everyone, to bring in business and profits. uses an XML sitemap to get their content indexed faster.