What does this mean?

[Imagine]

On some threads, to the left, I see little signs.
For example, I saw a yellow partyhat, a color wheel, thumbs down, a ribbon, and others.

What do each of these mean?

 

It's little icons you can set your thread as when you make it. It's completely optional.

Yellow partyhat is for admins. The red ribbon is for mods. The others are for donors and regular users.