"When you interact with your Windows device by speaking, writing (handwriting), or typing, Microsoft collects speech, inking, and typing information—including information about your Calendar and People (also known as contacts)—that helps personalize your experience. This information improves your device’s ability to correctly recognize your input, such as your pronunciation and handwriting. You can turn the Speech, inking, and typing setting (which is called Getting to know you) on or off in Settings.
Note: If you want to use Cortana, you must have Getting to know you turned on.
We also collect your typed and handwritten words to improve character recognition and provide you with a personalized user dictionary and text completion suggestions. Some of this data is stored on your device and some is sent to Microsoft to help improve these services. You can turn the Send Microsoft info about how I write setting on or off in Settings."
1. http://windows.microsoft.com/en-us/windows-10/speech-inking-...