Business rules

A business rule is a server-side script that runs when a record is displayed, inserted, updated, or deleted, or when a table is queried.

Use business rules to accomplish tasks like automatically changing values in form fields when certain conditions are met, or to create events for email notifications and script actions.
Note: Business rules can make use of scripts to take actions on records in the database. However, there are several other scripting options available on the platform, such as client scripts and UI actions.