MmoRpg games means full of real people, not just usual computer AI characters. You can talk and fight with real people in that games. Mmorp means shorten of Massively Multiplayer Online Role Playing Game. You can play as different race characters and even you can play opposite sexual person in this games. You can use different war items or you can drive different cars, even you can fly with skiing vehicles.
RPG is shortened word of Role Playing Game. This means you are making a role of someone in this fantastic dream world.Some may be a king, someone can be a princess, maybe a priest in this games. Even you can bea an animal or another creature.
Most of the mmorpg games are starts with free account except big games like World of Warcraft, this game was selling around $100 with CD, then prices dropped. But most of the Online games starts with free account. But you can buy additional bonuses and different clothes if you want to give a little amount of money. Also You can earn money with mmorpg games if you sell swords, armors and other precious items in real world. This happens in internet cafe or some special shops that you can exchange and buy game items offline. If you want to taste what mmorpg games like then you must try Gold miner 2 player, if you play this gold miner game with your friend or with your sister/brother you will see that multiplayer games are far better than single games. in games like gold miner 1 player its impossible to make competition together. Think about it, more than 2 player are same time, sometimes 4-5 sometimes hundred people fighting together for specific target. This is why people love to play mmorpg games online with people around world.
You can find different mmorpg game description and details in this page: Online Mmorpg List. There was 12 different game when I was checked at 2016 jenuary. I think there will be more.