Ranking Divisions are a new type of measurement designed to estimate the level of difficulty you encountered while earning your statistics for a particular hero. We designed the Ranking Division system specifically for these Hero Rankings.
What are the Ranking Divisions? There are currently 6 Ranking Divisions: Bronze, Silver, Gold, Platinum, Diamond and Professional. Each Ranking Division is broken into 10 stages, where 1 is the lowest and 10 is the highest. You will automatically advance from one division to the next as you play more difficult matches.
Why am I placed in ____ Division? Your division placement is based on the difficulty you've faced while playing a hero in a window of time relevant to the rankings. It can (and often does) vary from hero-to-hero. Your Ranking Division is not a reflection of your current skill and changes more slowly than your match skill bracket or MMR.
How do I get into a better division? It's simple - keep playing! As you play more matches and face more difficult opponents, your division will steadily improve. If you're already playing against the best players in Dota, keep at it and your division will improve. The Ranking Division system is designed to react to change in player skill more slowly than your MMR. If you improve very quickly the Ranking Division system will take time to catch up. Likewise, a decrease in your MMR from a losing streak won't immediately have a large negative impact. Important: Ranking Divisions don't correspond directly to match skill brackets or player MMR, nor are they a reflection of your current skill.
Read our thoughts on measuring player skill. I'm stuck at 10/10 Diamond, how do I get into Professional? The professional division is exclusively for players who compete play and win at high-end professional tournaments. We're looking into creating a new division between Diamond and Professional to better represent semi-pro players.