We will like to introduce a new, optional way that you can sort listings on search results pages called "Best Match".

How "Best Match" Sorting Works
"Best Match" lets you sort the listings you see based on a concept called relevance. A particular listing's relevance is based on past buyer behavior, as well as information like the listing title and description. For example, if most buyers running a particular search often end up viewing, bidding on, or buying, a certain type of item more often, this will be factored into our relevance calculations. These types of items might then display higher on the page in subsequent searches.

One very important note: using the Best Match sorting option won’t change which items you see when you search – only the order in which listings are displayed.

Where to find "Best Match" sort
"Best Match" is a completely optional way buyers can sort their search results. You'll be able to find this option in the next few days by clicking the drop-down menu next to "Sort by" at the top of the results list. If you’d like this to become your default sort view, use the “customize display” link right next to the drop-down.

If you have any doubts regarding this feature or to leave feedback, please post on this Thread.

Warm Regards,
eBay Team