Google Base Help

Google Base tracks total impressions, clicks, and page views for each item you post. Google starts counting as soon as the item is published.

• Impr. (Impressions): The total number of times your item has appeared in search results since it was published.
• Clicks: The total number of times someone has clicked on your item in a list of search results since it was published.

Note: Clicks and impressions statistics are updated daily. Statistics are available as far back as June 7, 2006.