It's something you do outdoors. Doing it well is a lot more difficult than it looks. It normally involves an individual, as opposed to a team, effort. Studying about how to do it can be helpful, but real success requires practice and experience. There is an element of luck involved.
Weather can have a huge influence on the results obtained.
The additive effect of small mistakes can be huge. There are many different products you can buy in an effort to help you get better results, but a real expert only needs a few basic items in order to excel. Some people seem to have a lot more natural ability than others. There are lots of different ideas about proper techniques to use. Some techniques work well for some people but not for others.