Ghostery makes the internet less intrusive by preventing some of the tracking that is going on today.
Ghostery is not available for Safari on macOS yet, that is a bit sad for me, else they do nothing wrong.
Ghostery blocks ad-trackers and other add-ons that slow down your experience online as well as prevents targeted ads when you visit other sites(a marketing team's worst enemy).
Sometimes because of the blocking I get ads on Youtube that are not in my language, but that's not a big deal.
Blocks ads online including annoying pop up ads on certain sites
Prevents people being able to track you online
Oh and it's free
The only one that I can think of is that sometimes I get ads in other languages. Not a big deal
What I like about Ghostery is how they explained how it works. I think it's easy to use and you can find it on any browser as an add-on. It's always recommended!
It takes time to get the full benefits, which is not their fault. and it doesn't replace the ad blocking app. So, you'll have to use another app to block ads.