What is a touch icon?
A touch icon is a graphic image in small format. The graphic image is designed especially for tablets, whereby the touch icon can be used if you choose "add page to home screen" in the web browser. This means that a shortcut is saved on the home screen of the tablet and when you click on the shortcut, the website opens in the web browser.
Offering touch icons helps the website owner to ensure there is sufficient control over how the website is displayed on different devices.