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

What is Database assertions in Laravel, and what role does it play in a real application? In Laravel, database assertions should be understood as part of a larger application architecture rather than as an isolated API call. Database assertions confirm that important records were created, updated or deleted as expected. 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: Feature tests exercise application behavior through realistic HTTP requests, authentication, validation, routes and database interactions. The specific focus here is database assertions: Database assertions confirm that important records were created, updated or deleted as expected. 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.