Select the number of times a visitor will see your campaign
Click the 'Rules' tab on the top bar. In the 'Frequency' section select the advanced option.
On the dropdown menu select one of the following options:
1. Show again after X days
2. Repeat up to X times per session
You can also mix the two, for example, I will choose the show my campaign up to 1 time per session and show it again after 5 days.
💡Tip: in case you want to increase your campaign's impressions and not overwhelm your visitor, choose to show your campaign up to one time per session.