Sharing history gives you a full overview of all the sharing activity across your entire account. See when files & folders were shared and whom they were shared with.
Click on any share to get the big picture. Who's been invited, what they've done (e.g. opened the share or downloaded a file), and more.
Adding notifications to a shared folder will send an email alert when there is activity in a shared folder, making it easy to know when a file has been uploaded, downloaded or edited by others.
Controls on each share let you manage all the options: you can set or remove a password, even retroactively. You can force a share to expire after a certain date, and decide whether or not a recipent has to provide their email to view the share.