You will generally be doing one of three things while you're here:

1. Making music!
That's the idea behind any compo: you have a theme and a limited amount of time (usually 1 week in this case) to make a song.
There are three major flavors of compo:
ZIQ: Pony Music Compo - a one-week compo based on a theme
ER3: Season 3 Episode Response (formerly ERS) - a one-week compo where you have to respond to the most recent episode.
WAT: Whatevercompo - runs randomly, could be anything.

If you're not sure how something will show up on the page (be it tripcodes or tags), there's also a page to test these things: TEST1

"But I'm no good / new to music / not sure I can write so quickly", you say? Perfect! This is a great place to practice and have fun, a lot because of number 2 on this list:

2. Listening to music!
After the deadline for each compo, we hold a sync-listen in IRC. This is exactly what it sounds like: everybody listens to all of the entries at the same time.
It's oldschool: the host will tell you when to QUEUE (press play twice to let the song load) and PLAY each entry.
...but it's quite fun. Even if you don't enter, you should join the sync.

3. Voting!
This is completely optional, but it's a nice way to leave a comment for your favorite songs from the compo.

Join us in IRC every Saturday for a sync-listen of each week's entries!

See the threads for this site:
MLR Thread
>>/ponychan/media/16919 RIP, 2011-2013

IRC channel:
#bronymusic @ irc.ponychat.net
(look for anosa, sci, zorg or doofcake)