What Is My Hub?

Stupid question: what is this? How does one use use it?

ETA: Weird. The thread title got changed somehow?
It was originally about the “currently following” section in the friends tab of the hub page.

What is my hub…

…and why does it take so long to load?

You follow threads you’re active in, you can use it to access a training log if you have one

Edit: Not a good reader I am. Good question. It seems to be a forgotten feature.