Section: Volume J

Explanation
A lookup field is a type of field that allows administrators to create a relationship between two objects by linking records from one object to another object. For example, a lookup field can link an account record to a purchase record by storing the account ID on the purchase record. A lookup field allows users to select an existing record from a pop-up window or create a new record from the same window. References:
https://help.salesforce.com/s/articleView?id=sf.relationships_lookup.htm&type=5

Section: Volume I