What is a Data Lookup Rule in ServiceNow?

[Mummadisetty]

I would like to understand the concept of Data Lookup Rules in ServiceNow with a practical example.

How are they configured, and how do they automatically set field values on a form?

Additionally, what are best practices for using them in production environments?

[glideFather · Accepted solution]

Hi @Mummadisetty,

please avoid creating duplicate questions. This has been answered already HERE.