Second Life Suggestions as the name suggests is a new way for directly taking SLer requests (you need to log in with your account to submit one):

Just sign-in with your Second Life account, select the topic or category that’s most appropriate, and describe your suggestion in the text box. Once you submit, you’ll see a confirmation page and receive an automated email as well. We won’t be able to reply individually to each suggestion, but every idea will be routed to the appropriate Lindens and each one will be reviewed and considered.

I just put in my suggestion (above), which of course, makes it the absolute top priority suggestion in the history of the world. (Well, maybe not, but I am convinced it's important.) The process is much more intuitive and easy than JIRA, the overly complex bug tracker which long ago also became a way for hardcore SLers to vent about various dramas.

That said, my guess is this new Suggestion system will rarely be used (unless it's tweaked, for a very obvious reason):