In Salesforce, what does a Roll-Up Summary field do?

Question

Salesforce Admin — Medium

In Salesforce, what does a Roll-Up Summary field do?

Accepted Answer

A Roll-Up Summary field calculates a value from child records in a Master-Detail relationship, enabling admins to aggregate data. This field type supports various calculations, such as COUNT, SUM, MIN, and MAX. The correct answer is specific to Master-Detail relationships, distinguishing it from other options. Incorrect options, like aggregating unrelated objects or using external data, are not the primary function of Roll-Up Summary fields.