The 'Views' metric allows you to see how many people have viewed a certain photo or video. Views from all sources are included: Picasa Web Albums, embedded photos (if applicable), image search, etc. The view count, updated every 24 hours, is located on the bottom-right of an individual photo or video and is visible to anyone who can see the content.
The number of views for each photo or video dates back to June 30, 2009. All views before this date are not included.