The user interface or UI is where interactions between human and machine happens. The main and primary goal of this intercourse is to maintain and permit effective control of the machine from the human side. It should provide the best user experience it can give by creating UIs which are easily understood and are all user-friendly.
A UI button hinders touch events and directly sends an action message to the computer. There are methods for setting the target areas of each UI buttons. The UI or user interface can mistakably involve the total User experience which may embrace the total appearance of a device, the response time, and content that is shown to the user.
Flat UI buttons are most commonly used as one of the user-friendly features. It makes the user experience totally very convenient as these buttons are easily understood and distinguished by it colors and texts.
All flat UI buttons have targets when you touch them. It sends the user to a different page and makes the whole user experience smooth because of it specifications. Normally, designers use simple flat UI buttons because the simpler they are, they easier they are to navigate. But others use their creativities by using shadows and different colors and effects when making flat UI buttons. Choosing flat UI button designs is all up to what you are trying to represent.