Want to configure the SERP (search engine results page) description? The NOODP tag let’s you do this, but note these caveats when using Yahoo:

In short, the NOODP tag allows webmasters to tell the search engine not to use the ODP’s title in the web search results. MSN was the first to implement the standard, and then Google followed. Tim Mayer said that Yahoo will be supporting the NOODP tag starting next week or the week after. But the tag will not prevent the Yahoo Directory title from displaying in the Yahoo search results.

Tim Mayer explained that Yahoo uses an algorithm to figure out when to use the title provided by (a) the webmaster, (b) the ODP directory or (c) Yahoo Directory. He said that since the NOODP is a standard already, they will add support for it. But they did not want to create a new meta tag to exclude the Yahoo Directory, because they use algorithms to best determine when to use which title. He said it doesn’t mean they will not create a new tag in the future, but the NOODP tag that will be released next week will only prevent the ODP title/description from displaying. Source