It's directly below your picture on your profile page, silly.
See the My Shared Items module on your profile page, that's your bulletin board. The cool thing about our bulletin board is that you can share messages and media. Click on MESSAGE, VIDEO, PHOTO or LINK to share your content. Directly underneath these buttons is the content your friends are sharing with you. Like all the modules, this module is customizable. To switch up the display select CHANGE LAYOUT from the upper right corner of your profile page and then EDIT at the top of the module.