digital marketing book or online courses

What do you think is the best way to learn marketing?
digital marketing book or online courses?
it’s complicated right! I would stay away from courses that are intended to give you a quick and fast learning experience. This comes from personal experience. I made these mistakes, there is a lot of stuff that online teachers cannot teach you. When I was trying to learn for the first time in an online course a lot of information was missed out by online instructors.
I started with youtube and moved into treehouse online courses, then bought a few courses from Udemy. Finally, I found some good online courses and learned so much from them. In that case, I will say you have to choose your course more wisely; you never know what is inside it.