Pi-hole is a free Network-wide ad blocker. This means all the devices in your home will have ads blocked!
And what’s very convenient is that you don’t need to configure anything for that on the individual devices (like your PC, tablet, phones etc).
Just install Pi-Hole on a cheap Raspberry pi3, set the default DNS address in your modem/router to the ip address of the pi3 and you’re good to go.

More info on their website: https://pi-hole.net/

If you have a Fritzbox modem you might want to change the following settings (I had to find out because initially ipv6 ads addresses were loading very slow):