Welcome to the forum!
I know there’s a lot to learn as you’re finding your way around this new place. So, let me introduce you to the handy forum search engine which that little magnifying glass icon in the upper right corner of every page of this forum.
Almost every field has its own thread. So when you copy and paste the name of the field that you’re asking about, you can find that thread.
Usually the first post of the thread has the field’s description. From the description of the field you were asking about
Enjoy your time with us!