This number represents how much power a user's vote carries within the Twin Galaxies adjudication system.
The Twin Galaxies adjudication system is driven by a very controlled peer-review voting process. This means that every participating member is given the ability to vote on score performances and the total outcome of the voting process yields a final result.
As a user's voting track record evolves over time, his/her CR will reflect the total level of expertise that they have displayed and accumulated. The higher the CR, the greater the voting power is.
This means that all votes are not equal in the system and the users who invest more of their time in the adjudicating process will generally have more impact on adjudicating outcomes than users who participate less.
As a user builds up their CR rating, they are building a legitimate and documented track record of their expertise in video game performance review that can be referenced by media and industry!