A custom function is a piece of code that can be used for automating a process. You can write your own function in
Deluge and call it from one or more business rules. It is similar to the built-in functions in Javascript like
DATE,
CONCAT,
REPLACE, etc. In Zoho BugTracker, you can update the issue fields automatically using business rules. With the help of custom functions, you can automate a notification, call a webhook, or perform logic right after a business rule is triggered.