Jiu Jitsu is hard. I've studied several martial arts in my life. Out of them all Jiu a Jitsu has been the hardest martial art to progress in. It's taken five times longer to earn my black belt in Jiu Jitsu than in other martial arts.
In Brazilian Jiu Jitsu, the belts are the indicator of a players expertise. Belts of different colours like white, blue, purple, brown, black, red are worn by different Brazilian Jiu Jitsu players. A brief introduction regarding the importance of various belts has been offered for the benefit of people who are new to martial arts.