Hotkeys are keyboard combinations that provide quick access to particular functions within a program - they make your life a little easier.
- press cmd+shift+5 (alt+shift+5 on Windows app) to take a screenshot (it will be automatically uploaded to CloudApp).
- press cmd+shift+6 (alt+shift+6 on Windows app) to take a screen recording (in either GIF or HD)
Customize Hot Keys on Mac
Customize Hot Keys on Windows