The phrase "handy feature" refers to a useful or convenient aspect or characteristic of something. It means that specific feature can make a task or problem easier to handle.
Sentences with «handy feature»
Which is a really handy feature for you to connect with your friends and family so that you can all game together. (joystikrevolution.com)
If the key is in your pocket, the gate will open or close automatically if you kick your foot under the bumper, a very handy feature when your hands are full. (autofocus.ca)