The question of what technology do search engines use to crawl websites is an important one. Search engines, of course, use spider technology to crawl the web and locate websites that have either been submitted or requested by their users. As far as I’m concerned this whole subject goes far beyond the simple definition of a “web spider”. In order to understand what technology do search engines use to crawl your site, you need to be familiar with a few of the most basic of web crawling technology – XML.
XML stands for “XML syntax”. Essentially, it’s a way of describing the structure of the pages that we read on the internet. If this sounds like Greek to you, don’t worry – search engines use a very sophisticated tool known as the “spider” to scan the text of web pages and return relevant results based on the structure of the pages. If you’ve ever encountered a site that returned a number of different web pages, these were most likely returned using the very same technology as the ones that produced the original set of pages. This technology, known as “XML”, has been around for quite some time now.
So, what technology do search engines use to crawl a website? In order to describe what they look for, they generally use what’s known as a “tree” format. Basically, each page of a website is divided up into what is called “children” or branches. A tree can contain any number of roots (clues) that lead to more information on branches off to the left or right.
For example, when looking for a product online, you might type in “cell phone” in the search bar and hit the “search” button. If you are using a major search engine, such as Yahoo or Google, you may be presented with hundreds of results. Each of these listings will have their own page within the search engine that is called a “crawl.” A “crawl” is basically just a section within the engine, where you’ll find the latest updates (if any) about that particular topic. The reason a search engine will scan a website and create a “crawl” is so that the engine can update its list of results whenever it finds new links, new pages added to the website, or any other event that may alter the way it ranks a particular site.
The basic idea behind how a search engine determines which pages it will list in its results, and thus how it creates the “crawl,” is that whenever the engine discovers something interesting, it will list it. However, each search engine has a different version of what they consider “interesting.” In addition to the standard tree format used by most engines, some engines use what’s called a “weighted” format. Essentially, this means that a certain feature of a site can affect its ranking.
In addition to crawlers, the Internet itself contains many other crawling technologies. For example, Google utilizes what’s known as a “webcomputing engine” that is primarily used to collect data from websites around the world. Web engines also use what are known as “web indexes” to determine how popular a website may be.