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

What is Layouts and sections in Laravel, and what role does it play in a real application? In Laravel, layouts and sections should be understood as part of a larger application architecture rather than as an isolated API call. Blade layouts allow a shared template to define sections that child views fill with page content. 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: Blade is Laravel's templating engine and supports escaped output, control structures, layouts, components, slots and reusable view patterns. The specific focus here is layouts and sections: Blade layouts allow a shared template to define sections that child views fill with page content. 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.