WhatsApp groups for business: what they are good for, and what they cost

A WhatsApp group is not a broadcast list. Every member can see every other member's phone number and message them directly. For internal teams that is fine. For a group of customers it is a disclosure you made on their behalf.

The two things people use them for

Internal coordination

Drivers, field staff, a shift team. This works, and it is often better than any tool you could buy, because everybody is already there. The caveats are ordinary: the history lives on phones, people leave with their access, and nothing is searchable by the business afterwards.

Customer announcements

This is where it goes wrong, in four ways:

• Numbers are exposed to strangers. Under most data protection regimes you have disclosed personal data to third parties without a basis.
• Anybody can post. Announcement-only mode fixes this, and most groups are not set to it until after the first argument.
• Members recruit from it. Your competitors' salespeople will join and message your customers list one by one.
• Leaving is public. Unsubscribing from a group is a visible act in front of everybody, so people mute instead - and a muted group is a channel you no longer have.

Where groups genuinely win

When the members are meant to talk to each other and already know they are in a room together: a class, a tour party, a project team, a delivery run. The shared visibility is the feature rather than the flaw, because everyone consented to being in the room.

If you run them anyway

1. Announcement-only unless the point is discussion.
2. Say what the group is for in the description, and pin it.
3. Never add somebody without asking - send an invite link instead, so joining is their action.
4. Have a second admin, or the group dies with one phone.