It basically stops whatever process the phone was trying to perform and brings you back to your iphone home page. So anytime your iphone is not working right you should restart the iphone.
Things You’ll Need:
To force quit an application on an iphone yu should press and hold the sleep button. This is the rectangular button located on the top of your iphone if you are looking at the screen. It should be on the right side of the top of the phone. Keep this button held down until the slider bar appears on the bottom of your screen (it will be red). Now instead of pressing the slider bar you should press the home button (the circular button on the front of the iphone. Keep pressing this button until the application that is freezing closes. If this does not work you should try step number two. You should only reset an iphone as a last resort.
To restart your iphone you will need to press and hold the sleep button, (this is the rectangular button located on the top of your iphone). Keep this button held down until the slider bar (at the bottom of the screen). Once the slider bar appears you can press on the arrow and slide it toward the right side of the phone. This will turn the phone off. Now you will need to wait ten seconds and turn the phone back on. To do this simply press the same button again until the Apple icon appears on the screen. This should be the second thing you try if you are having problems with your iphone. The last resort should be to reset an iphone.
The final option if your iphone is messing up and the other solutions did not work would be the reset iphone option. To do this you will need to press and hold the sleep button (rectangular button on the top of the iphone) at the same time you will need to press and hold the home buttom (circular button on the front of the iphone). You will need to keep these held until the Apple icon appears on the screen. This can take over ten seconds so be patient!
If something on your iphone is not working you may need to reset your iphone. Make sure you follow these steps in this order and it will likely solve your problems!