ad blocker sofware questions

Hey all!
Ever since I got my ipad, I've always been afraid of adblocking software because I didn't want 2 screw up Vo. or web sites themselves.
but now, with the kind of ads I'm seeing now, I'm starting 2 reconsider. But, I do have questions.
1. have any of you guys used an ad blocker? how does it work?
2. which ones do you recommend? which ones are the most accessible?
3. what's been your experience with ad blockers in general? have you liked using one?
also, will it block ads if I open articles in the Facebook app & in google news?
and if I decide 2 use 1 & don't like it, how easy was it to get rid op including any web browsing extensions?
I may have other queries later on as I get answers & or recommendations. because I really want 2 get as much info as possible before I download 1. Jhanks in advance 4 all your help! :)