Taking screenshots isn’t always easy due to the strange and different button combinations different manufacturers use. Plus, you don’t always want to save a screenshot. The information you’re sending to people is often stuff that you don’t need to keep.
An update rolling out to Google Now on Tap (seemingly backend rollout rather than app update) adds a new share button at the bottom left corner, which will share a screenshot of your display without showing your status bar or saving the screenshot to your device.
It’s definitely a useful addition, and may give people more of a reason to use Now on Tap. Let us know when you get it!