Widgets give you an easy way to view current information at a glance—today’s headlines, weather, reminders, battery levels, and more. You can view widgets in Today View and add them to your Home Screen or Lock Screen to keep this information at your fingertips.
You can interact with widgets on the Home Screen or Lock Screen without opening the app—you can take action on the widgets for Music, Podcasts, Safari, Home, Contacts, and more. For example, tap 
on the Music or Podcasts widget to play a selection.
Tip: A Smart Stack (with dots next to it) is a combined set of widgets that uses information such as the time, your location, and activity to automatically display the most relevant widget at the appropriate time in your day. You can add a Smart Stack from the widget gallery to the Home Screen, then swipe up and down through it to see the widgets it contains.
