Passing:
1-32 is short and safe simple passes - Tiki Taka
33-66 is mixed passes so a variation of short and long - Balanced
67-99 is long ball galore - Stoke
Please note that these values work together, if you set the speed to 30 and the passing to 80, that will not work.
It's basicly telling your team you want to build up slow, but to play long balls as much as they can. No logic in that right? I would say the difference between Speed and Passing is maximum 35-40.
for example: Speed: 65 Passing 34
Positioning
This stands for off the ball movement.
Organised: limited movement. Your player will stick to his role and will make space as best he can in that role.
Meaning a CDM will stay back as much as he can, and a RM will try to stay close to the line as much as possible.
Free Form: more freedom for player movement and allows players to move around more to make space, creating more passing options and more diversity to your build up. a RM will be able to cut inside for you to make the killer pass.