Progress percentage is added every time you explore a location or solve a puzzle successfully. When the progress meter reaches 100%, the location or puzzle's rank increases. The exception is the rank of Magister; in this case, the meter will be filled beyond 100%.
The higher the rank of a location or puzzle, the more experience and rewards you earn. Exploring a location with a high rank requires more energy, and the quests are harder to complete.
You can help your friends and leave help at locations and puzzles.
There are a total of 10 ranks: