For some time now, search engines like Google, Yahoo, and MSN have been using ODP (Dmoz) descriptions for search engine results descriptions. These descriptions are supplied by human editors overseeing the ODP. Although usually relevant and valuable, these descriptions at times are outdated, unrelated, and even incorrect.
Webmasters have been asking for a way to opt out of these ODP search engine results descriptions and MSN is the first engine to offer a solution.
So what we did was introduce a new option at the page level – a robots meta tag – that tells the MSN search bot not to use the DMOZ site snippet. This is something that only can be done at Web page level, by a webmaster, and is not done as part of the robot.txt file.
So in your Web page you’d put
<META NAME=”ROBOTS” CONTENT=”NOODP”>
<META NAME=”msnbot” CONTENT=”NOODP”>
Once MSN’s crawler revisits your page, you should see the changes reflected in the search results.
So far MSN is the only engine to recognize the tag, but hopefully the other engines will follow MSN’s example.