Guide
Store WhatsApp groups are not a company chat. Grade it.
Store groups, franchise chats, and head office email pretend to be one company. Frontline staff will not open Slack. Grade phone-first chat for retail, then send the poster.
The WhatsApp floor
Why WhatsApp wins the floor: Already on the phone. No email login. Regional managers still lose the thread when someone quits.
What the grade is really asking
How many sites, how often people leave, whether history must stay with the company. That flips WhatsApp vs a work messenger more than feature lists do.
Head office tools are a different quiz
Teams or Slack can still fit HQ. The frontline grade is separate. Do not average them.
Send the poster
90 seconds. Then share the grade with the ops lead who owns the groups.