Number of unique visitors for the selected period. Visitor is a unique "Cookie", which is assigned to every user. If a user disabled cookies in the browsers a visit will not be counted.
Bounces
Singe visit of the site without significant actions (not a bounce when there were more than 1 page view, page view lasted more than 15 seconds or visitors reached a goal).
Regular visitors
Visitors who visit this site for at least 7 days during last 28 days.
Hosts
This is a unique pair of IP address and proxy server IP address (if applicable). Uniqueness is preserved during a day, a week or a calendar month — depending on a type of provided statistics.
Page views
The number of times a page was viewed.
Page depth
Total page views per visitor for the selected period.