Personal Quest, do I let the players know the reward?

Hey just a quick question because I'm not sure about it. Do you let the players know the reward for completing their personal quest?

On one hand it feels a little bit meta. But on the other I feel like it will REALLY motivate the players to be more active about their quest. Only 2 characters seems to be active in pursuing theirs and I think the rest forgot entirely that they were on one.