The "About the Author" is a short bio no longer than 140 characters that you can include under your image on your individual Hubs. It's not a separate page. I created several individual bios, each one specific to the categories I write about.
I like the fact that we can make each bio relate to the subject matter of the hubs we attach. I feel that this gives our readers a quick way to get to know the author without going to their profile.
And the fact that it is customized for each hub's category, it makes more sense to the reader than if they clicked to our profile page, which can tend to be too general.
Hubbers who write hubs on many different subjects can make really good use of this. But even if you write within just one niche, it still is useful since your reader will see a short bio right there on the hub.
The short length is just right. It forces me to make my point with a few words, which readers won't hesitate to read.
You can create up to 25 bios and then include any number of you hubs to be assigned with each one.