As you dive into DFP Small Business, here are some resources to help you figure everything out.
Inside of DFP, you'll find helpful information.
Hovering over the question marks () in DFP will give you a short explanation as to what a specific term means or how to use a certain feature.
In-product help articles
On the top right corner in your DFP Small Business account, you can click on the "Help" link to find a number of suggested Help Center articles relevant to whatever you are doing in DFP at that stage.
Outside the product, there are even more ways to learn about DFP.
Covers most of the questions you might have, so this should be your first stop for any questions.
DoubleClick for Publishers Product Forum
Other publishers may have had the same questions as you have, so the forum is a great place to learn from their experience.
DFP Small Business YouTube channel
Watch a variety of tutorials that introduce you to concepts such as ad serving, inventory, tagging, trafficking, targeting, and reporting.