When a website features in the listings of a search engine, the Meta description is the first thing that a user takes notice of. Most of the times, the search engine will also display the content from other pages of the website, which contains the keyword, used in the search query.
However, if your website is listed in ODP (Open Directory Project), the search engine will display the content taken from ODP sites. To prevent such information from displaying, you will have to force the search engine to overlook the ODP information. And to do so you must include robot Meta tags.
Here is an example: <meta name=”robots” content=”noodp” />
Major search engines such as Google, Yahoo and MSN support inclusion of ‘noodp’. If a search engine is showing information about your site that has been taken from directories, then you can force the search engines to ignore the information by including a tag:
<meta name=”robots” content=”noydir” />
Also, if you want your web pages to display in Google web search results but not in Google news then include
<meta name=”googlebot-news” content=”noindex” />
To avoid directory information from showing in MSN, use:
<meta name=”msnbot” content=”noodp” />
You may also use a single robot to prevent different attributes such as
<meta name=”robots” content=”noodp,noydir” />
However, after adding these tags it might take some time for the effect to take place. Hope these examples help you index your snippets in a better way!