All right time to get student. So for those of you who are new production is the phase where the actual camera gets rolling and shots get taken, which will eventually translate to what you see on screen. This is usually the most intense and action oriented phase as tensions might run high when everyone is running around on set. This is also where all those preparations in pre production pay off as your props, equipment set decorations, all prepped and lined up to be used on set. As a filmmaker, this is the part where you get to have fun, and shoot the scenes on set, getting close to the final film and your actualization of your vision. As a producer, this is the part where you get to see how your planning pays off.
Bring the words and visuals into the real world. production is usually always the most fun parts of any film production, but also the phase where the crap hits This man and can potentially cause problems if you're not prepared.