There are many more examples of relevancy indicators a spider considers when visiting your page, such as the proximity of your important words to the beginning of the page. Here, as well, the spider does not necessarily see the same things a human visitor would see. For instance, you place a left-hand menu pane on your web page. People visiting your site will generally not pay their first attention to this, focusing instead on the main section; however, the spider will read your menu before passing to the main content – simply because it is closer to the beginning of the code.
Remember — during the first visit, the spider does not know yet which words your page relates to! Keep in mind this simple truth. By reading your HTML code, the spider (which is just a computer program) must be able guess the exact words that make up the theme of your site.
Then, the spider will compress your page and create the index associated with it. To keep things simple, you can think of this index as an enumeration of all words found on your page, with several important parameters associated with each word: their proximity, frequency, etc.
Certainly, no one really knows what the real indices look like, but the principles are as they have been outlined here. The words that are high in the list according to the main criteria will be considered your keywords by the spider. In reality, the parameters are quite numerous and include off-the-page factors as well, because the spider is able to detect the words every other page out there uses when linking to your page, and thus calculate your relevance to those terms also.
When a Web surfer queries the search engine, it pulls out all pages in its database that contain the user's query. And here the ranking begins: each page has a number of "on-the-page" indicators associated with it, as well as certain page-independent indicators (like the Page Rank). A combination of these indicators determines how well the page ranks.
It's important to keep this in mind: after you have made your page attractive to visitors, ask yourself whether you have also made it readable for the search engine spiders.
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Article comments
1 - David Ben-Ariel
My Beyond Babylon blog just jumped from a humble two to a better three! Why? Don't rightly know. I've heard ideas, but they're just guesses. Something about original content?
2 - Aaman
Your point "When a Web surfer queries the search engine, it pulls out all pages in its database that contain the user's query." is not completely accurate - that would take too long. It actually queries the index built from cross-referencing across pages.
3 - [Geeks Are Sexy] Tech. News
I never really understood pagerank very well. I've read about it, understood the concept, but fail to see why my blog still has a pagerank of zero with about 300 sites pointing to me, including a few very big ones like lockergnome, infoworld, digg, lifehacker, etc...
I still get some pretty good returns from google and msn search, but I never see anyone from yahoo.. All of this puzzles me :)
Cheers!
Kiltak
[Geeks Are Sexy] Tech. News
4 - Aaman
GeeksAreSexy, your blog actually has a pagerank of 5, and that's not bad at all, and yes, Geeks Are Sexy:)
5 - [Geeks Are Sexy] Tech. News
5? Wow :)
I tried that page a few days ago and it showed 0 :)
I guess it doesn't get updated very often..
Thanks!
Kiltak
[Geeks Are Sexy] Tech. News