There are free applications you can use with your web browser that will block those intrusive ads from your screen. I use one in particular called Adblock Plus. It is an Add-On that is used with FireFox and Chrome. It is free and can be installed easily.
Once you have Adblock installed it will block pretty much all of the advertisements you come across on the internet. Even most of those ads that play before videos will be blocked. The result ends up saving you a lot of time and annoyance with having to navigate around these ads. If you are tired of advertisements interfering with your web browsing, be sure to try out a free ad block program like Adblock Plus.