WebProNews

The unavailable_after meta tag on a web page tells a spider when it should stop indexing a particular page. Webmaster World started buzzing today with a news of a new meta tag being proposed by Google. The site picked up the unavailable_after news from Dan Crow, director of crawl systems at Google, via SEO pro Jill Whalen. Whalen's account of the news appeared at High Rankings:

Google is coming out with a new tag called “unavailable_after” which will allow people to tell Google when a particular page will no longer be available for crawling.

For instance, if you have a special offer on your site that expires on a particular date, you might want to use the unavailable_after tag to let Google know when to stop indexing it. Or perhaps you write articles that are free for a particular amount of time, but then get moved to a paid-subscription area of your site.

A formal date for supporting the tag has not yet been announced.