Renown are points that can only be earned by completing quests, Paralogues, and auxiliary battles. For quests, you’ll see how much renown you’ll earn as part of the rewards. You don’t have any use of it until you unlock the Saint Statues. You’ll see how much Renown you have by Talking to the Saint Statue Artisan.
Don’t hold back in exchanging your Renown for permanent boosts that will help you and your party members’ growth. For more information about these upgrades, kindly refer to our guide’s dedicated page for the Saint Statues.