Hello,

I've noticed while watching tutorials that instructors usually add a null node at the end of their node tree. What's exactly the purpose of the NULL node? Is it more of an organizational/style thing?

Yes it is. And if you give it a name like OUT (in UPPERCASE), it will be automatically sorted at the top of listviews.

So if you're want to reference it from somewhere else it's quite convenient. E.g. if you browse for this null node because you want it to reference it from a object merge.

Please have a look at the new Output SOP. It's quite new and even a bit more convenient.