What does a content blocker do?

[C7 POWER]

Sorry for the stupid question, but now that iOS 9 is out and we've all installed it, I'm seeing threads about content blocking apps. What am I missing? Does iOS 9 open up advertising?

 

[Cougarcat]

Blocks advertising and trackers.

 

[C7 POWER]

What advertisements? I've never seen spam pop ups, etc

 

[Apple_Robert]

What advertisements? I've never seen spam pop ups, etc

There are advertisements and trackers on practically every site including this one. Look on the main page with your phone.

 

[LeoNatan]

What advertisements? I've never seen spam pop ups, etc

Then you don't need one.