When you check your statistics you can see at every Site ID a percentage of suspicious visits. After enough traffic at our platform will block them automatically (see the red icon), but in the mean time its good to know when you can block them by yourself. If a Site ID has more then 50% suspicious visits and the CPM is the same as your bid you can choose to block it after an XX amount of visits.
Don’t need to block based on suspicious visits:
If your CPM is much lower than your bid you will get refunded for the suspicious visits.