It is a service similar to https://pastebin.com/. It allows you to upload your own pieces of text/code and provides a short link that you can send to other people.
The user need to specify:
- expiration time -(he period during which the link will be valid)
- access restriction (PUBLIC - available to everyone, UNLISTED - available only via link)
The short link looks like: http://pastebox.ru/1