In order to work properly, Cortana needs to listen out for your voice, learn about what you type and gather information about you and your habits. And the more Cortana knows about you, the more useful it can be.
But you may be uncomfortable with the amount of data that Cortana harvests – particularly since some of this data is stored online on Microsoft’s servers.
If you’d rather not share this much information, or if you feel Cortana is just a gimmick, then you can disable it.
Click Ask me anything > Notebook (the icon of a small circle inside a square) > Settings again and switch the Cortana can give you suggestions, ideas, reminders alerts and more top to Off.