What is the primary function of a model file in Looker?

The primary function of a model file in Looker is to define relationships between Explores. In Looker, a model file serves as a blueprint that outlines how different datasets within the data source relate to one another. By establishing these relationships, the model enables users to join tables and views effectively while creating explorations. This structure is essential for ensuring that the data retrieved in analyses is accurate and meaningful, as it allows Looker to understand how to connect various pieces of data based on defined associations.

In contrast, other functions such as defining exploration strategies, holding visualization elements, or storing user permissions fall outside the primary role of a model file. Exploration strategies pertain more to the way data is accessed and analyzed rather than its underlying relationships. Visualization elements are typically stored in dashboard or visualization files ("view" files), focusing on the presentation of data rather than its structural connections. User permissions are managed separately from model files to ensure that access controls are applied as needed without being tied to the specifics of data relationships.