Overview:

In Follow the Butterflies, you assist Clementine Willardsey by tracking a swarm of butterflies that seem to lead to an interesting location. The quest takes you to the Forbidden Forest, where you follow the butterflies to a chest, then return to Clementine with your findings.

Quest Requirements:

Completion of Potions Class main quest.

Quest Objectives:

• Talk to Clementine Willardsey in the Three Broomsticks
  Begin the quest by speaking with Clementine inside the Three Broomsticks. She’ll mention the butterflies and ask you to follow them.

• Find the Butterflies in the Forbidden Forest
  Follow the quest marker to the Forbidden Forest. You'll come across a small swarm of butterflies near the beginning of the forest.

• Find out where the Butterflies are going
  Follow the butterflies as they lead you through a small river and to a chest. Once you open the chest, you will unlock the Followed the Butterflies achievement.

• Return to Miss Willardsey
  After finding the chest, head back to Clementine in Hogsmeade to complete the quest.

Rewards:

• Followed the Butterflies

• Conjuration Spellcraft

• 180 XP

This finishes the Follow the Butterflies side quest in Hogwarts Legacy.
For all other side quests and main quests, check out the complete Hogwarts Legacy walkthrough.