Thanks for reaching out to us. You can always personalize the type of ads that you see on YouTube. Here's how: https://goo.gl/ZB1qVL . Also, mind sharing more info about the issue with the notifications? We'll take a look.
Thanks for the additional details! Make sure you've opted-in to receive *all notifications*. The bell might be on the default setting, which is to receive notifications "occasionally". Here's more info: https://goo.gl/mAH8cu . Hope this helps.