On this page of the Assassin's Creed Valhalla walkthrough guide you will find a detailed walkthrough for Winifred side quest.
Rewards: 1,200 XP.
At the location marked in the image above, you will meet a child who is trying to ward off bees. When you speak with him, you will learn that he needs some honey for his friend.
Walk up to the marked beehive and get some honey. Then follow the child and place the honey on the stone he indicated.
Sit on a wooden log and wait. After a while, a bear will appear on the spot and the mission will end.