Answer: marry the wife of Bath
Step-by-step explanation:
The Host was a main character in The Canterbury Tales. He welcomed the piligrims and gave them food and drink. The host proposed a contest to keep everyone entertained during the journey. It was a story telling contest and the reward for the winner was a meal paid by the rest of the contestants.
This is the Host's role. However, it can be said that his role is not to marry the wife of Bath.