Open the Photos app
Tap Albums
Tap the plus icon
Tap New Shared Album
Enter a name for the album
Tap Next
Add people by entering their Apple IDs or contacts
Tap Create
Tap the shared album
Tap the add photos button
Select the photos or videos you want to share
Tap Add
Invite others to view or contribute if needed
Open Settings if shared albums are not available
Tap your name
Tap iCloud
Tap Photos
Turn on Shared Albums