Here is how you can move your group chats from WhatsApp or any other messenger app, to Signal:
Step 1: Create a group on Signal.
Step 2: Tap into group settings and tap on “Group link.”
Step 3: Turn the toggle on for the group link and tap on Share.
Step 4: Share in your former messenger of choice. You may require approval from a group admin before new members join.
Step 5: Once the group is formed, users can tap on ‘Share’ to forward the link to users you want to move.
Step 6: Turn the toggle on or off to approve new members in a group using the share link.