@TeamYouTube I do wonder how the commercial tags work on youtube. My niece was watching a kids video and got an add for vaginal creams. I would imagine that would have the "mature" tag or something?
If you see any inappropriate ad on YouTube, please report it for a review here: http://goo.gl/YUVJ86 . Also, you can always personalize the type of ads that you see on YouTube. Here's how: https://goo.gl/ZB1qVL . Hope this helps!