Why is Nested eager loading important in Laravel applications, and what problem does it solve for developers?

Why is Nested eager loading important in Laravel applications, and what problem does it solve for developers? The key reason to understand nested eager loading is that Laravel applications are usually composed of several layers that must work together predictably. Related relationships can be eager loaded through nested relationship paths. Ignoring that boundary can lead to duplicated logic, poor security, unnecessary database work, or code that is difficult to test. Why it matters in practice: Eager loading retrieves related data intentionally to reduce repeated relationship queries and avoid common N+1 query patterns. The specific focus here is nested eager loading: Related relationships can be eager loaded through nested relationship paths. This question is designed to test not only terminology, but also how the concept fits into Laravel's request, application, database, security, or deployment workflow.