This is a solid breakdown of how to do a short author bio. I like the fact that you broke it down into smaller components and then went on to explain each of them, and then provided examples of what that looks like with professional, published authors. The piece was well organized, and articulate. Nice work!

I would have loved to have seen a little more information on adapting the short bio for other uses. You mention at the beginning of the article that writers usually have multiple bios for a variety of purposes, but the article only focuses on the short bio. I think there's an opportunity to really get into the "big picture" issue of constructing a bio for all occasions, which could be as simple as adapting this structure to encourage the audience to create a longer bio, and then pare it down for a variety of lengths (i.e., writing a full bio of, say, 500 words, then strategically figuring out what to remove to make it fit 250 words, 125 words, 50 words, 240 characters, etc.).

Overall, I thought this was an informative, useful article with great tips for how to construct a bio of a very specific length. With a bit of revision, I thought it would be a really excellent piece that addresses writing bios of all lengths. But you're definitely off to a fantastic start!