The best use case for ads, I think, are in retargeting– meaning you only hit people who've already visited your site before, and you hit them maybe with an offe

The best use case for ads, I think, are in retargeting– meaning you only hit people who've already visited your site before, and you hit them maybe with an offer they might be interested in. But you have to be sensitive to the context, etc. I don't envy ad folks.