If you choose a topic as a targeting option in GDN, there is a lot of rubbish websites that lose you a ton of money.
I did it, and in placements, there were a ton of weird Chinese websites that google thought it was in the topic of MLM.
So, now I have learned that the best way to think about GDN is exactly like Magazine ADs.
Instead of choosing a topic (which is going to have a lot of rubbish in there because I TESTED IT…)
The best way is to choose an exact website, like a magazine about the same niche, in the placements, so you KNOW that exact website and that exact AD works.