This is a very cool software! I highly recommend to try it out if you own a drone, even if just for a fun, I learned so much when I was tinkering with it.

Around a year ago I needed to obtain an aerial map of some specific area, but due to recent drastic changes (construction work) and poor quality of the public maps I had to somehow create my own. I fly drones for recreational purposes so I was thinking about using it to make that map when I found out about ODM which is exactly what I was looking for. ODM itself just processes already obtained images (AFAIK) so there is also a whole process of getting them from drone. That's when I found about other software for planning fully automated flight paths so there is a perfect overlap between the photos (required for quality maps and 3D reconstruction). I managed to make a high quality map with 1px:1cm ratio via ODM that I still use from time to time.

Like I mentioned if you own a drone I would recommend to try it out even if it's just for fun as for my case I learned a lot of other stuff I didn't knew before like that automated flight path planning.