Before watchOS 3, Apple Watch owners had two options at their disposal when it came to waking the device and using apps. In watchOS 2 and earlier, you could adjust how long the Apple Watch display stayed awake when you tap to wake it (15 or 70 seconds) and what you wanted your device to be awoken to.
Prior watchOS versions defaulted to waking up to the current watch face but could optionally be told to return to where you were before the watch went to sleep. In watchOS 3, options for apps have been expanded.
You can now select how long third-party apps show on the Apple Watch screen when you raise your wrist with three additional options at your disposal.