The flower girl is essentially a young bridesmaid whose job it is to walk down the aisle and spread flower petals or confetti for the brides or grooms to walk on.
The page boy will do a similar role to the flower girl and it’s up to you if you choose to give your pageboy a particular role. Think about the age of the child and how well behaved he will be on the day.
Your page boy can also act as a ring bearer presenting the rings to you on a specially made cushion. Whoever is in charge of the rings should lay the rings on the cushion at the latest opportunity – do not give the role of minding the rings to the page boy.