What is Headers and cookies in Laravel, and what role does it play in a real application?

What is Headers and cookies in Laravel, and what role does it play in a real application? In Laravel, headers and cookies should be understood as part of a larger application architecture rather than as an isolated API call. Request objects expose HTTP headers and cookies through framework-friendly methods. A strong understanding includes its purpose, the layer where it belongs, the data or request flow it affects, and the situations where another mechanism may be more appropriate. Practical context: Laravel request objects provide a convenient interface for reading query parameters, form input, files, headers, cookies and route values. The specific focus here is headers and cookies: Request objects expose HTTP headers and cookies through framework-friendly methods. 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.