Always fill out your “about” section.
Your readers are already fascinated with your words, now they want to know a little something about you.
All social media platforms have an “about” or “bio” section that can be used to your advantage. It’s helpful in two ways: first, it makes you more real and accessible to your current readers; and secondly, it can draw in new readers who stumble onto your page/account/site.
Quite often, a prospective reader will go to the “about” section to get a sense of who the writer is and what sort of topics they write about. If you haven’t filled it out, prospective readers may move on.
In general, it’s a great way to introduce yourself and your style/genre of writing to current and prospective readers. No need to make it an autobiography though. Save that for your next book!