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

What is Layouts in Laravel, and what role does it play in a real application? In Laravel, layouts should be understood as part of a larger application architecture rather than as an isolated API call. Blade layouts provide shared page shells so child views only define page-specific sections. 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 views separate presentation from request-handling and database logic, with Blade providing the framework's templating features. The specific focus here is layouts: Blade layouts provide shared page shells so child views only define page-specific sections. 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.