We measure a total number of sessions within the payment date range.
As you can see in our pricing plans, they are based on number of sessions.
A session is the time period a user is actively engaged with your website. In other words, it's your amount of visitors. We have to emphasize that it is not unique visitors but every session.
When you have implemented the tracking code on your website we start measuring the number of sessions you use.
If you don't have any campaigns active we still count the number of sessions. This is why we highly recommend you to have a campaign active at all times.
Note: If you're not running any campaigns on your website, you can pause your account from using up your sessions. Remember that this won't cancel your subscription.