Cortana is your truly personal digital assistant. Cortana is designed to help you get things done. Ready on day one to provide answers and complete basic tasks, Cortana learns over time to become more useful every day. Count on Cortana to stay on top of reminders and work across your devices.
Wherever you go, Cortana will follow. Because life isn't limited to one device, neither is she. Set a reminder on your PC and have it pop up on your phone, or home speaker and vice versa.