You can share files or folders to other people such as your friends, colleagues, etc...
Guide
Choose an item to share and click on Share icon:
A dialog will be shown and then enter email addresses which you want to share. In my case, I enter my email address:
Click the "Share" button to proceed Share:
Congrats! your item was shared successfully. An email including a key will be sent to that person. Otherwise, you will get an error in case there is unable to share to other people.