Can showing an ad too often actually hurt a campaign?

[Christina_Hops]

Seeing the same advertisement a few times can help people remember a brand, but too much repetition might get annoying. I'm curious how advertisers figure out when an ad is getting enough attention and when it's being shown so often that people just start ignoring it. At what point does repeated exposure stop being helpful?

 

[Patricklewis]

I've had moments when I kept seeing the same ad so often that I eventually got tired of it, even if the product was interesting at first. Repetition can help people remember a brand, but it doesn't mean they'll become more interested every time they see it. How often do you think a business should show the same ad before switching things up?