You must be a group admin to add or remove participants from an existing group. A group can have 256 participants.
To add participants:
- Open the WhatsApp group chat, then press Options > Add participants.
- Alternatively, select the group in your chats list. Then press Options > Group info > Add participants.
- Search for or select contacts to add to the group.
- Press Done.
To remove a participant:
- Open the WhatsApp group chat, then press Options > Group info.
- Alternatively, select the group in your chats list. Then press Options > Group info.
- Select the participant you want to remove.
- Press Options > Remove from group > REMOVE.