Files stored on iCloud can be shared with others through a link. Once the link is created, it can be shared through email, messaging, Twitter, AirDrop and Facebook.
In iCloud, tap the "Share" button to create a link to send to others. After choosing a sharing option, simply enter the recipient's information and send the link.
In order to send the link, the sender must be signed into his or her account. Only documents that are under 200 MB can be shared using this particular method. Larger documents over the limit should be shared as an attachment through email instead. If sending via AirDrop, the recipient has to accept the file before it is transferred.