In what situations and at what point does the applicationWillTerminate method work in an application?

The applicationWillTerminate method is called in an iOS application when the app is about to terminate, that is, before it is unloaded from memory. This method provides an opportunity to perform final cleanup, save data, or release resources. However, it is important to understand that this method is not called if the app simply moves to the background or if it terminates unexpectedly by the system (for example, due to low memory). Therefore, it is better to use methods related to transitioning to the background, such as applicationDidEnterBackground, for saving data.