The NHL doesn't have an official definition for giveaways, but it's understood to be when a player's own actions lead to a turnover of the puck.
The problem with that is that it's entirely subjective. Each building's official scorers might have varying opinions on what constitutes a giveaway, and there's human error involved in recording these stats as the game goes on. So, it's tough to use the straight giveaway number as an assessment of a team's play.
In Saturday's 4-1 loss in Columbus, the Penguins were credited with 10 giveaways to the Blue Jackets' five. 10 is far from the Penguins' single-game high this season. But this was a game where it felt like those giveaways had a monumental effect on the outcome of the game.