Here is a case.
You are going to put up an expensive banner at a prominent location in the city. It is expensive but you have managed the fund somehow. But you cannot afford any mistake because taking a second chance is expensive. As a small business owner or startup, you just want to make the most out of it.
Why don’t you take the help of AdWords? Run a small campaign targeting the same audience. Create 2 ad copies with 2 headline variations and see which one gets higher clicks – you will get a hint!