Google Shows Longer Descriptions in Results
According to Google's blog (if you haven't noticed) they are now showing longer snippets with search results, for longer queries. So, if a user's search term is longer than a few words, each result will show a longer description.
This is significant, as recent data shows that users are searching longer terms more than ever before - 10% more than last year.
It's now increasingly important that your snippets are descriptive enough to induce clicks from Web users. This means optimizing your meta tags for your pages and/or products and regularly checking search results to see how your descriptions are rendered in results. Your content management system (CMS) might also be helpful in writing strong descriptions.