In case the title isn't descriptive enough, Monsterpalooza is a fan-based convention of all things horror. It's not as big as ComicCon, the big daddy of fan-driven conventions, or even Wondercon (just recently passed) but the convention is growing and might someday challenge even the bigs.
In most ways, it resembles those other conventions: lines to get in (later in the day though,) busy, happy crowds of people of all ages, cosplay, t-shirts shouting out big love to both popular and arcane IPs (intellectual properties) but the levels are all definitely lowered somewhat. After all, MP has only been around since 2009 and it's still a youngin' compared to the others which have been around for decades-plus.