Create or join a group to share your pictures, videos, ideas and much more...
Groups are spaces where you can exchange ideas (and who knows maybe meet someone!) It all depends on the choices made by the creator : in some groups everyone will be able to speak to each another and on others no one will be able to join unless they are invited !
To check all of this out create your own group by heading to the 'My Groups' menu and clicking on "Create a group".
If you would prefer to simply join one of your friends groups, have a look on their blog or profile. The groups that you have created and the ones you're a member of are displayed in the right hand column of your blog and in a moveable section on your profile.