As you can safely know, the client and also the admin the customer data such as e.g. Easily change the address in the client or admin area. The Admin will receive an e-mail. An e-mail which usually flew over quickly and then deleted.
In some situations, however, it may be important to know who made which changes to the data. For example, for a complaint, the one invoice could not have been made because the address was wrong. Our module logs all changes to the client data (address, name, e-mail and telephone number) including the date and who made the change. This way, you can quickly find out who made the change and whether the new address, e.g. only after dispatch of the invoice.