ad network guy here... Yes, with retargeting you hit a lot of people that aren't interested in the product, but you also hit a lot of people that are lukewarm

ad network guy here... Yes, with retargeting you hit a lot of people that aren't interested in the product, but you also hit a lot of people that are lukewarm to warm leads. We're talking about the difference between, say, .05% CTR running ads in a content category versus .1%+ with retargeting across ad exchanges. Specifics vary between advertisers: try visiting Shopify and you're going to see their ads 10x+ per day every day for a month... but less aggressive retargeting frequency (1-3x/day) is used all the time.