SEO is a big thing, this much everyone knows. But some people still don’t know the importance of great descriptions, or how to get those descriptions into places like Google and other search engines. I started re-researching the various meta-tags available, and came across a new one that I didn’t know about – NOODP. I didn’t understand why this was important until I did some research, and found that Google will pull the Open Directory Project (ODP) description for your site if you do not specify one. Well, that’s handy! But what if I don’t want every page on my site to use the ODP description? That’s where this handy article comes into play:

One source we use to generate snippets is the Open Directory Project. You can direct us not to use this as a source by adding a meta tag to your pages.

To prevent all search engines (that support the meta tag) from using this information
for the page’s description, use the following:

<meta name="robots" content="NOODP">

To specifically prevent Google from using this information for a page’s description, use the following:

<meta name="googlebot" content="NOODP">

If you use the robots meta tag for other directives, you can combine those. For instance:

<meta name="googlebot" content="NOODP, nofollow">

In short, these meta-tags should be used when you have a page specific description you would like to show on the search engines.

For more information, check out the Google answer here: Changing your site’s title and description in search results