Developers
Widgets are an essential aspect of home screen customization. They are "at-a-glance" views of an app's most important data and features, instantly available from the user's home screen.
Use widgets to remind users about important information in your apps and games, even when your apps are closed. For instance, if you have a news app, showcase the latest headlines.
Tip: Make your widgets useful — provide in-app information like news, game status, or upcoming deadlines. Widgets should serve as more than a launcher icon.