Sooner or later when dealing with android based phones you WILL come across the word ROOT, which I’ve seen many explanations of the last years.
Edit: I feel like i have to explain a BIT more. The common term “to root” is basically a mix of several things done to your phone. And, to get “root” you often need to add things to your phone that makes it hard for you to get updates and then you have to “unroot”. But, here I will cover the actual thing that’s known by Root.
But, what is it really? To make it really short and technical:
Root is to describe a phone that got the SU (superUser) package flashed onto it, and with that you got file and folder rights to ALL things. Just like admin rights on a windows-based computer. And with root you can make things better, but you can at the same time make things MUCH worse since root gives you access to system things you really shouldn’t have access to.
Basically, if you don’t know what you’re doing with root on your phone that can make it a very expensive paper weight. I’m not going into just HOW you get root onto a phone now, since that is a rather difficult process that’s different from phone to phone.
I advice that you DO NOT Root your phone unless you are very aware of that you are doing.