The same customer, typed into four tools.
Or entered once, and synced everywhere.

1. 1
   A change in one tool

   A new customer, a new address, a paid order.

2. 2
   Detected in seconds

   A webhook, not a weekly CSV export.

3. 3
   Cleaned and checked

   Formats fixed, duplicates caught.

4. 4
   Written everywhere

   CRM, accounting and email list stay identical.

5. 5
   Duplicates merged

   Updated in place, never copied twice.

Tools and names are examples. Each field has one source of truth, so two tools never overwrite each other.