Start by going to Photos from the main menu.
To share one photo or video, tap the photo or video to open it, then click the share button on the bottom menu.
To share several photos and/or videos, select the photos and videos you want to share by tapping and holding them. Then click the share button in the bottom menu.
To share albums, go to Album in the bottom menu of the Photo timeline. Open the album you want to share, then open the album menu in the top right corner. Select share from the menu
