If you tell 4-digit number to your friend, your friend can open the site you recommended.
We sometimes encounter the following cases.
You want a person to look at your web page.
But the URL is too long, so it is hard to tell.
In such a case this application is very useful.
Please open this application, and enter "0125".
You will look at the homepage of the apple.
This page is closed in approximately one minute.
Start the app and enter "0000", you will be able to read the manual.