This setting allows to configure the maximum number of notifications that will be sent based on current product availability. This is a numeric value with 2 decimal positions. Examples:

Notification rate: 1

This value represents a 1:1 notification rate. If there are 25 units available, a maximum of 25 email notifications will be sent.

 Notification rate: 0.2

This value represents a 1:0.2 notification rate. If there are 25 units available, a maximum of 5 email notifications will be sent.