By adding an image of your free gift to your blog, you are showing the visitor to your page exactly what they will receive by subscribing to your list.
The visitor is, therefore, more likely to subscribe as you are showing them the end result - what they will receive to solve the problem that they have.
Paul goes into full detail about how to upload your free gift to your blog and how to link it to AWeber in the following training video:
Blogger > 14. Creating An Opt-in Box
