If you are using Windows 10 on a personal computer or laptop, you can start a program by clicking on the Windows search field and typing in the name of the program or application.
Alternatively, there may be a shortcut for the program on your Windows taskbar or a shortcut on your desktop.
Microsoft uses specific icons for their office apps.
To open an app you can click one time on a program icon on your taskbar to start a program.
To open an app from the desktop you can double click the icon to start a program.