Right now we don't offer analytics with Webstore, but you have two ways of tracking traffic to and from your webstore:
1. Google Analytics - create a FREE Google Analytics account and you will be able to track how visitors arrive at your webstore, how many visitors you have, if they continue to ebay etc.
2. eBay's store traffic reports - eBay offers store owners traffic reports that will allow you to see where visitors are arriving from to your eBay store.
If you have any other questions on the subject feel free to comment here below.