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Wednesday, July 19, 2006
Google currently indexes over 8 billion web pages. However, before these pages were placed in the index, they were each crawled by a special spider known as the GoogleBot. Unfortunately, many web masters do not know about the internal workings of this virtual robot.
In fact, Google actually uses a number of spiders to crawl the Web. You can catch these spiders by examining your log files.
This article will attempt to reveal some of the most important Google spiders, their function, and how they affect you as a web master. We'll start with the well-known GoogleBot.
Googlebot, as you probably know, is the search bot used by Google to scour the web for new pages. Googlebot has two versions, deepbot and freshbot. Deepbot is a deep crawler that tries to folow every link on the web and download as many pages as it can for the Google index. It also examines the internal structure of a site, giving a complete picture for the index.
Freshbot, on the other hand, is a newer bot that crawls the web looking for fresh content. The Google freshbot was implemented to take some of the pressure off of the GoogleBot. The freshbot
This means that the more you update your web site with new, quality content, the more the Googlebot will come by to check you out.
If you'd like to see the Googlebot crawling around your web property more often, you need to obtain quality inbound links. However, there is also one more step that you should take. If you
Creating a Google sitemap allows you to communicate with Google, telling them about your most important pages, new pages, and updated pages. In return, Google will provide you with some
The next Google bot in our lineup is known as the MediaBot.
MediaBot - used to analyze Adsense pages
MediaBot is the Google crawler for Adsense Publishers. Mediabot is used to determine wich ads Google should display on Adsense pages.
Google recommends that webmasters specifically add a command in their robots.txt file that grants Mediabot access to their entire site. To do this, simply enter the following code into your robots.txt file:
Keep in mind that ads can still be shown on a page if the MediaBot has not yet visited. If that is the case, the ads chosen will be based on the overall theme of the other pages on the site. If no ads can be chosen, the dreaded public service announcements are displayed instead.
There is a strong debate over whether or not the MediaBot is giving websites with Adsense an advantage in the search engines.
Even Matt Cutts has confirmed that the Adsense Mediabot has indexed webpages for Google's main index. He states, "Pages with AdSense will not be indexed more frequently. It's literally just a crawl cache, so if e.g. our news crawl fetched a page and then Googlebot wanted the same page, we'd retrieve the page from the crawl cache. But there's no boost at all in rankings if you're in AdSense or Google News. You don't get any more pages crawled either."
Matt Cutts claims that your website does not get any advantage by using Adsense. However, in my mind, simply getting your site updated in and of itself is an advantage.
This is very similar to Google Analytics, which also promotes a slightly higher degree of spider activity.
Those who run Google Analytics on their site can expect additional spider activity.
However, you certainly shouldn't depend on any of these tools for getting your site indexed. The key to frequent spidering is having quality inbound links, quality content, and frequent updates.
Have images on your site? If so, you have likely been visited by our next Google spider, the ImageBot.
The Imagebot prowls the Web for images to place in Google's image search. Images are ranked based upon their filename, surrounding text, alt text, and page title.
If you have a website that is primarily image based, then you would definitely want to optimize your images to receive some extra Google traffic.
On the other hand, some web sites may not benefit from Google image search. In most cases, the traffic from the Image search engine is very low quality and rarely converts into buyers. Many
One of the few exceptions I would make is if you have a site dedicated to downloadable images.
Our final bot is completely dedicated to the Google Adwords program.
AdsBot - Checks Adwords landing pages for quality
AdsBot is one of Google's newest spiders. This new crawler is being used to analyze the content of advertising landing pages, which helps determine the Quality score that Google assigns to your ads.
Google uses this Quality score in combination with the amount you are willing to bid to determine the position of your ads. Therefore, ads with a high quality score can rank higher even if other advertisers are paying more than you.
This is one of Google's many efforts to ensure that they are delivering the best results to their users.
Today's Google bots are becoming more advanced all the time. However, nothing beats relevant, quality, updated content. Deliver that and the search engines will eat it up.
by: Shawna Seigel
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