Google has known searchers do this for sometime…and they have preached the use of great and unique descriptions along the same line. Remember, your Meta description does not help you rank… but is rather a unique opportunity to elicit a click from searchers. This element however, if not appropriate for the query will be replaced by a snippet to better serve the searcher…. All good, no arguments here.
Duplication for sorted and alternate view urls continues to be a problem for shop owners. The new rel=”canonical” attribute is excellent, but in our dynamic shopping carts implementation is a nightmare for most. So, Google to the rescue (at least for their results) as now in your Google Webmaster Tools you can adjust your parameter handling for Google.