I run an eBay store that has pretty decent revenues but no brand recognition, and we make pretty heavy use of their Promoted Listings function.
We've generally found for competitive items that sacrificing 5% to ad spend allows us to increase the price of the item by 20% without experiencing any reduction in sales. There is no way to fake that.
For my other business, though, (Low-cost USB Oscilloscopes) I found Google, Facebook and Amazon ads to be completely useless. Even then, though, it didn't cost a lot of money or take a whole lot of time to get a definitive answer and cancel the campaign.
I run an eBay store that has pretty decent revenues but no brand recognition, and we make pretty heavy use of their Promoted Listings function.
We've generally found for competitive items that sacrificing 5% to ad spend allows us to increase the price of the item by 20% without experiencing any reduction in sales. There is no way to fake that.
For my other business, though, (Low-cost USB Oscilloscopes) I found Google, Facebook and Amazon ads to be completely useless. Even then, though, it didn't cost a lot of money or take a whole lot of time to get a definitive answer and cancel the campaign.