Thursday, January 29, 2009

META Tags and Search Engines

META Tags and Search Engines
META Tags and Search Engines

Before posting or submitting pages to search engines, indexes and directories using robots, follow this short guide to achieve the desired result:

Before submitting your site, please check the following:

* Web Page Title - The title of your web page is the text that appears between the HTML tags. The search results display this title when your web page is listed. <br /> * Web Page Description - The web page description is the first 200 characters after the HTML <BODY> tag that appear on your web page. The search results display these words when your web page is listed. <br /> Therefore, these words should accurately describe the intent of your web page. <br /> <br />When you submit your web page URL, it will be added to the World Wide Web the next time the index of the respective search engine is updated. Note: It can take up to several weeks until this update is made ... thus, don’t be in a hurry if your page doesn’t appear at once in the listings. Once the update is made users can search for your page from the World Wide Web on the home page of the respective search engine. <br /> <br />Note: Some commercial Internet Service Providers may use a robots.txt file to prevent web robots from indexing their users’ web pages. You can check to see if a server has a robots.txt file by entering your domain name/robots.txt in the Go To or Location box of your browser, for example <br />http://www.myurl.com/robots.txt <br /> <br />If your server is using a robots.txt file and the page you submit is protected by it, then your page can not be added. <br /> <br />Categories of Sites <br /> <br />By sending your web page URL to a search engine, your page will also be considered for categorization under popular topics or, and select or index pages. <br /> <br />Using META Tags to Describe Your Page <br /> <br />Specifying an exact description to use: <br />You can create a description for your web page, rather than having the search engine’s robot use the first 200 characters. Use the <META> tag within the <HEAD> element to do this. The basic syntax is: <br /><META name="description" content="Write your description here"> <br /> <br />Do not use any HTML tags within the description or content part of the META tag. <br /> <br />Suppose the HTML at the top of your web page looked like: <br /><HEAD> <TITLE>My Company Home Page

the following title and description would appear when your page is listed:

My Company Home Page
Home of the World’s Greatest Widget

Specifying keyword phrases:
You can use a second tag to specify keyword phrases that further describe your web page. The basic syntax is:


For example, if the HTML at the top of your web page looked like:
Acquire Home Mortgae

then the search robot will take them into account when it indexes your page. Using the tag to add keywords to your page simply allows you to provide extra information about your page without that information appearing to the reader.

Please note that the robot indexes your entire page (except any text within comments), regardless of whether or not you include a description or keywords in the tags.
The words in the tags are indexed in addition to the rest of the document.
Notes on Using Tags and Images

* Length of Description and Keywords
Your description can include up to 200 characters of text. The keywords can include up to 1000 characters of text. Those figures are typical but vary from robot to robot.
* Overusing Keywords
Do not repeat the same keyword more than 7 times in the tag. If you do this, the robot will ignore the entire list of keywords.
* Sites using Frames
In your main HTML file (the file containing the tags), you should include a description of your site using tags. Make sure that your description and keywords adequately summarize the contents of the frames on your page.
* Pages using JavaScript
If JavaScript functions make up the first 200 characters on your page, you should use tags to provide a description for your page.
* Pages using Images
The robot also indexes the ALT attribute in the tag. If your site mainly consists of graphics, you can also use the ALT attribute to describe your page. For example: photo of 1997 Edsel

Changing the Title and Description

If you want to change the title or description of your web page, make the changes on your page and they will automatically be incorporated into the index the next time the respective Web index is updated.
Search Engine Relevance Rules

The relevance rules vary from search engine to search and can change in any given search engine from time to time. The relevance rules are strictly guarded trade secrets and must be determined by careful experimentation when submitting URLs. This requires a lot of testing. But since the rules change, the testing must be ongoing. I do much testing of search engines and can give a fairly good impression of what the rules are as I write. It is easiest to test the relevance rules of sites that respond rapidly to a site submission. For this reason, Altavista has the most understood relevance rules of any search engine. Here are some known relevance rules:

Altavista-gives greatest relevance to the titles as defined by tags. After that it gives priority to headers, starting with header level 1 <H1> and moving up. Last of all it gives priority to the contents of text and META tags, with greatest weight given to text at the top (any META tags). This heirarchy defines the skeleton of the result list returned by Altavista. Within each of these level, timeliness (when a site was submitted) determines the order of the results. In the past the latest submissions were returned first, but that resulted in much promotional material cluttering the database. So in December 1996 Altavista inverted the relevance of timeliness. This had lots of ramifications. For me it means that most of the hits from people to my sites from Altavista come from people with fetishistic depravities. Descriptions in description META tags are returned as summaries. <br /> <br />Webcrawler-a primitive search engine that appears to give relevance to simply the number of occurrences of a string in a document without regard to placement in the document. This means large pages consistently are at the top of results returned from Webcrawler. Webcrawler ignores META tags and timeliness is not a consideration. Machine-calculated samples of text are returned as summaries. <br /> <br />Infoseek-This search engine appears to give extra weight to META tags, but not to titles or other heirarchies of text. Key words appearing near the beginning of a file have high relevance values. This works to the advantage of straight text files since HTML files must begin with and other strings that do not relate to the content. Simple repetition of keywords in the text or META tags seems to work miracles in getting sites to the top of relevance. Timeliness is a weak factor at most. Descriptions in description META tags are returned as summaries. <br /> <br />Magellan-gives greatest relevance to the titles as defined by <TITLE> tags. Then it gives priority to keywords which must be entered when submitting a site to Magellan. Finally it takes into account to the number of instances of words in the text. Timeliness is not a consideration. The first few dozen words of text are returned as summaries. Magellan is more upfront about their relevancy rules than most and have included some information in their FAQ. <br /> <br />Hotbot-This search engine appears to give some weight to META tags, but not to titles or other heirarchies of text. Timeliness may be a factor, but it is not a big one. The ratio of a searched for word to other words in the content is decisive in determining relevance. Descriptions in description META tags are returned as summaries. <br /> <br />Lycos-appears to give relevance to the number of occurrences of a string in a document within the first 200 words of the document. Lycos appears to ignore META tags. Somewhat more relevance is given to the latest submissions. The first few dozen words of text are returned as summaries. <br /> <br />Excite-appears to give relevance to the number of occurrences of a string in a document with most relevance to contents near the top of a page. Timeliness may or may not be an issue. Excite’s robot spider is especially active in changing sites. Excite appears to ignore META tags. Machine-calculated samples of text are returned as summaries. <br /> <br />Opentext-appears to give relevance to the number of occurrences of a string in a document with most relevance to contents near the top of a page. The first few dozen words of text are returned as summaries. <br /> <br />Yahoo-Unlike most modern web databases, Yahoo is assembled by real humans. Relevance is returned in a hierarchical way with rank being the whim of the individuals compiling the index. Brief human-written descriptions or nothing at all are returned as summaries. <br />Search Engine Update Frequency and activity Level <br /> <br />Altavista-the spider (Scooter) lies dormant for long periods but the database is updated nightly with the manual submissions made that day. There is a limit on the number of submissions per domain per day. <br /> <br />Webcrawler-both the spider and updating process seem to have been completely dormant since the Summer of 1996. For this reason URLS in the index are few in number and out of date. <br /> <br />Infoseek-there doesn’t appear to be a spider associated with Infoseek, but it updates its database regularly, every two weeks or less. <br /> <br />Magellan-unlike most of the other search engines, Magellan is not a search engine whose database is constructed with the help of robots. Like Infoseek, it relies wholly on submissions by web authors. Magellan does not appear to update its index very often. <br /> <br />Hotbot-the spiders are not particularly active for Hotbot, but Hotbot updates its database regularly. <br /> <br />Lycos-Lycos spiders sites that are submitted, but does not track links off the server of sites submitted. The database is updated every few weeks or so. <br /> <br />Excite-has the most active spider of all, and so its database is always very current. Submissions to the Excite database are also accounted for relatively rapidly, in a week or two. <br /> <br />Opentext-both the spider and database updates seem to be dormant or chaotic at best. <br /> <br />Yahoo-these days, to get in this database requires being a part of the Web good old boy network: being mentioned in magazines or by others regarded as cool in the hot web sites. It’s also possible to get your URL mentioned in Yahoo when new levels in the heirarchy are created. You see, Yahoo’s human surfers consult other search engines (particularly Altavista) to find URLs to place on the new pages. <div style='clear: both;'></div> </div> <div class='post-footer'> <div class='post-footer-line post-footer-line-1'> <span class='post-author vcard'> Posted by <span class='fn' itemprop='author' itemscope='itemscope' itemtype='http://schema.org/Person'> <meta content='https://www.blogger.com/profile/06779520070757414712' itemprop='url'/> <a class='g-profile' href='https://www.blogger.com/profile/06779520070757414712' rel='author' title='author profile'> <span itemprop='name'>saebaryo</span> </a> </span> </span> <span class='post-timestamp'> at <meta content='http://webmasterbox.blogspot.com/2009/01/meta-tags-and-search-engines.html' itemprop='url'/> <a class='timestamp-link' href='https://webmasterbox.blogspot.com/2009/01/meta-tags-and-search-engines.html' rel='bookmark' title='permanent link'><abbr class='published' itemprop='datePublished' 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