A tile is a modern app’s representation on the Start menu in Windows 10, and can be either static or live.
A static tile displays the default content, which is generally just a full-tile logo image for the app.
Live tiles can show updates from your friends, new email, app notifications, and the next appointment on your calendar at a glance, even without opening an app. And because everyone who uses the PC can sign in with their own Microsoft account, each person can personalize their own tiles, colors, and backgrounds.
For more information about live tiles, see:
Guidelines for tiles and badges - Windows app development
Sometimes your live tiles may continue to display old information, even after it has been deleted. For example, the Photos app's live tile still displaying images you deleted from your Pictures library.
This tutorial will show you how to clear information from
live tiles for all your modern Store apps pinned to your Start menu to refresh the tiles in
Windows 10.