Why is Ability checks important in Laravel applications, and what problem does it solve for developers?

Why is Ability checks important in Laravel applications, and what problem does it solve for developers? The key reason to understand ability checks is that Laravel applications are usually composed of several layers that must work together predictably. Application code can check whether the current user is allowed to perform a named ability. 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: Authorization determines what an authenticated user is permitted to do and can be expressed through gates and policies. The specific focus here is ability checks: Application code can check whether the current user is allowed to perform a named ability. 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.