How a Crawler Based Search Engine Works

In 2013, less than 20 years after the mainstream Internet came into existence, the amount of information on the web has easily exceeded an exabyte of data, or 1 billion gigabytes. This data is currently increasing at a rate that would physically be equivalent to a distance of 00.03 lightyears. So how does everything magically get sorted and perfectly placed within the world’s search engines? The answer is the Google algorithm, and other search engine algorithms like it.

How Google robots work

To begin with this process, first it is necessary that all of the information is collected and run through Google’s analysis, so to speak. Search engines use robotic programs called spiders to carefully look over all the individual web pages on the Internet and then assign them a ranking within the algorithm. The act of moving through web pages is known as “crawling” and it does not only entail looking through a single page, but also every page connected to that one through backlinks.

Imagine if a person was driving on a highway and getting off at every exit, making a judgment on the location, and then continuing on. The highway is like a giant link between all the locations, but ultimately, the driver is only comparing everything with the place they started with. However, the driver also has some restrictions as far as what they can identify when studying a location. For example, they can only identify places if there is a sign to indicate what that place is and obviously can’t see inside of every building on the road, only the outside.

Bringing this concept back around, the spider will visit every web page linked to the one it’s actually studying. The next step is then to bring back this information and place it somewhere on a scale, which is Google’s algorithm. Once the web page’s “value” is assigned, the page is then indexed or “saved” within the system, so the robot that visits the page again will remember it from before. This cycles repeats on a continuous basis with an ever increasing number of bots needed to match the unending increase of online information.  Now that you understand how a Google bot works, contact our SEO company to help your site rank well.nes are more important to visit first, and may disallow pages if the webmaster chooses using a robot.txt file on their website.  Like the driver of the car, it cannot interpret images unless there is an alternate text to indicate what the image is (like a sign on the building), and they can also not see “through” websites if iframes or other types of unreadable code exists.

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