What Is Middleware?
Middleware provides a convenient mechanism for inspecting and filtering HTTP requests entering an application.
Authentication Middleware
Authentication middleware can check whether a user is logged in before allowing access to protected pages.
Custom Middleware
Developers can create custom middleware for application-specific requirements such as checking user roles, subscription status or license validity.
Middleware Parameters
Middleware can accept parameters. This makes it possible to create flexible access-control systems for different user roles and permissions.
Real World Usage
Middleware is commonly used in SaaS applications for subscription checks, admin permissions, API authentication and request logging.
Conclusion
Understanding middleware is important for every Laravel developer because it provides a clean way to control application requests.