A simple trick is to go to /r, and type in “ad free vault” and “surf ads autotechnique” to get to the “ad-free vault” section.
Scroll down to the bottom and scroll down a little bit more, and you’ll see a list of ads.
Click on one of those, and then “get rid of it” and it will disappear.
You can also go to your “surfing history” and delete the ads from there.
There are a ton of ads on the subreddit, but this is probably the best one for those who have access to a decent internet connection.
And if you don’t have access, you can also search for them manually by typing in the name of the ad and clicking “search”.