Whether you're new to DNN or experienced community member, you'll eventually find yourself on new grounds. And of course, there is always the community, the forums, social media, etc. to help but be assured: DNN is well-documented for various topics like marketing, development, administrators, and designers. There is so much documentation that we had to create a separate website for that... Woohoo!
Take Me to the Documentation
Take Me to the Docs Project on GitHub