Implicit route model binding is convention-based. Laravel infers the model from a type-hinted controller or closure argument and a matching route parameter name, then resolves it automatically using the model’s route key.

Explicit route model binding is registered manually when the lookup needs custom behavior. It is useful for resolving a model by nonstandard logic, transforming a parameter, or binding a value object. In both cases, the goal is to centralize request-to-domain resolution instead of duplicating lookup code in controllers.