I'm learning all the time.... I've put an ad blocker on my iPad, I paid 78p for it. I installed it from the App Store and enabled it in Settings, selecting it from the Safari menu.
The Ad blocker seems to work OK except that some sites refused to load because they detected I was using an Ad blocker! For those using an iPad or iPhone, it may help to know that if you hold down the refresh/reload symbol at the end of the URL (Address) bar, you get the option to turn off the Ad blocker temporarily. Just hope someone might be interested (I didn't choose my username without reason).