Could someone explain the sidebar to me?

[Meatboy]

What are "referrals" and can I edit my titles like "orgiest"?

[persephone325]

Referrals are people who sign up for Elliquiy using your referral link. You can find your referral link if you view your own profile. You can copy it and use it anywhere.

Your title can't be edited. It's linked to your post count. That link gives you the run down of the different titles you can earn with your post count. They change automatically.

[Oniya]

While you can't edit your post-count ranking, you do have the option to add a custom title above it if you go to your profile and select 'Modify Profile', then 'Forum Profile'  (It's the same page where you added your avatar.)

The 'Personal Text' box will display below your avatar, and the 'Custom Title' box will display above your avatar and the post-count ranking.