I've been doing a lot of tweeting out from Amazon lately helping out fellow authors. I've noticed that not too many have their twitter accounts attached to their Author Central page. That is if they even have an Author page via Author Central. Yes, I realize all the social media stuff takes up time from things like writing your next great novel. If you are out there marketing your book anyway then why not take advantage of the tools available to you already.
One advantage to having your twitter account on Amazon is that if a clever tweeter wishes to add your name to their tweet out then you're able to see what's being said. Another possible side-effect is that a reader might contact you to say, "Hello, just saw your book on Amazon and thought I'd take a chance just because you look like a great person." It could happen. Besides, what can it hurt to add a professional type twitter account where people can find you.
Some may say, "why bother with social media at all." The biggest reason is Search Engines. The more your name is out there...the more chance people can find you/your body of work via a Google Search. They can read your twitter posts, your Facebook posts, and even your Goodreads posts. So remember be as professional as possible at all times.
This is just my personal opinion but I hope it is helpful to you just the same.
Have a great one!
co-author to David McKoy
co-owner of Call Sign Wrecking Crew, LLC