How to Measure the Impact of Digital Advertising?

There's no way to test that, is there? So the advertiser just have to guess whether their ads are working long term. Procter and gamble left digital advertising for a while, didn't they? They they complained and moved out. But you're saying they've moved back in. The biggest spender in didgley said, look, we need to clean this thing up. And lots has happened since he made that speech four, five years ago. Well, it turns out that he is right.proctor and gamble are now back into digital advertising,. having optimized their own algorithms.