You may remember Jones as the Ohio State quarterback that took over late in the 2014 season and guided the Buckeyes first to a conference championship win, and then a national championship game win, despite only breaking into the lineup after injuries to two players in front of him. He won the starting job at the outset of the 2015 season, but was eventually benched.
Jones has a lot of you look for physically: ideal size (6'5", 253 pounds) and good athleticism for it (4.81-second 40-yard dash speed), with arguably the strongest arm of any prospect available this year. But the accuracy and game management issues that led to his benching at Ohio State will hold him back in terms of draft status this year, as he's very much in developmental project territory.
Which, as you're well aware, is something the Bills could use at quarterback: a highly talented player to coach up for a couple of years while they try to figure out if their current quarterback is a long-term solution at the position.