G.impclksrv.com pop-up ads are typically present to a computer system having an adware infection. Whether it is not a virus, it has ways to harm your system as well as your privacy.
Whenever you see pop-up ads from Phone-Alerts.com, it simply means that an adware is taking over your system. To stop seeing such pop-up ads, the only thing you have to do is to remove it.
Booking.com may seem useful but soon enough, you may experience various troubles like excessive display of pop-up ads and even acquiring more other viruses.
Fun2cell.net is a potentially unwanted program which mere intent is to display various advertisements. It may not be a virus but it can be considered as big threat on the entire system.
Bet365.com itself is not malicious, but the thing is, there are people like cyber criminals who exploit this program in order to generate online revenue at all expense of the end users.