] Cortana is a Personal Digital Assistant(PDA) - a voice command and voice search app, it enables users to control their device using voice commands versus pressing buttons or typing search commands, initiate searches for a variety of 'things'
[WHY]
] perform voice activated actions
] open "apps", open "websites", make a voice call to one of your "contacts", send an SMS message OR email to one of your "contacts", ] create appointments in your calendar, create reminders , alarms, ] post to favorite social media networks like - fb, twitter and more ] create notes & memos
] the difference between a cortana search and a traditional search for information is that instead of getting back a list of links to sites on a page as your search result, you get back a card of information that displays the information you are requesting.
] perform voice activated search queries - device
] search your device for files, people, music,
] automatically performs predictive search based queries based upon your Personal Information
] based on your location, your search history, your email, your calendar
] maintains a user editable notebook on your preferences, interests, etc to
] type using voice dictation
] open word, ] create document titled 'my memoirs', ] type 'today was a good day, I spent it learning about this neat app called ...' ] ] save & exit
] when you use this app, your sending your data to [google], did you ever ask yourself what does [google] know about you? more importantly - do you know what [google] does with [your data]?, do you still want google now?