I have a billboard on a fence next to the road advertising my IT services in a matter of fact way.
Thousands of drivers pass it daily.
It should work, but it doesn't, and I know why...
Simply informing people about what you're selling doesn't work. What you need to do is to hypnotise people. Imply that your product makes them smarter, sexier or classier. Use slick design and typography. Add a striking, attractive photo backdrop. Use light and animation. Then they will come.