Supernewfag here How does renderfarms work? I only have experience

You don't need to make a new thread for every question, just post here: >>550171

A render farm is just multiple computers/gpus set to each do parts of a render job

Computer 1 does one frame of a render job
Computer 2 does another frame
Computer 3 does yet another frame etc.
This all happens at the same time, so say your render farm has 50 computers, it'd render 50 times faster than your own one (not factoring in the hardware specs itself)