Learn more about the community and how they are learning Korean and about Korean. Do a little listener-to-listener chit chat. Keep it civil, and everything else goes.
I have this one too, but I don't like it that much, it's more complete, but you have to buy both english-korean and korean-english versions to really be able to translate both ways.
There may have been a few words in the first one I haven't found, but far far more that I have found. I like it's ability to save words as a favorite for later use, and the ability to search both korean and english makes it superior