[michaelbuckbee]

There are a variety of adblocking technologies. The spectrum goes from the simplest which just block domains, to ones which block substrings of URLs and DOM elements to ones actively stopping "please stop adblocking" notices.

In general AdBlocking works very well on the open internet with the browser of your choice. However, they're basically non-functional for things happening in-app over HTTPS connections. So, with the majority of FB mobile traffic happening over the dedicated FB app - they are largely immune to blocking AND have a much better set of demographic targeting features.