What's the best organic traffic source after Google?

Youtube is the most searched engine after google. So try it. Also everyone loves videos and its demand won't be faded away soon.

Honestly, for me, it’s Pinterest. I know it sounds weird if you think it’s just recipes and DIY, but the search behavior is crazy underrated. I started pinning my blog posts consistently—nothing spammy, just good visuals—and traffic trickled in for months without me doing much else. Reddit can work too, but you have to be really careful not to self-promote or you’ll get roasted. Pinterest feels more forgiving, plus pins stay alive for years. Google’s obviously king, but Pinterest is a solid 2nd choice if your audience hangs out there. Just my two cents.