While an instant response from an app is the best, there are times when your app won’t be able to comply with the guidelines for speed. A slow response could be caused by a bad internet connection, or an operation itself can take a long time. For such cases, in order to minimize user tension, you must reassure users that the app is working on their request and that actual progress is being made. A wait-animation progress indicator is the most common form of providing a system status for users when something is happening or loading. It’s important to provide feedback to the user about what is happening with the app within a reasonable amount of time.