Motor skills are broken up into gross motor and fine motor.
Gross motor - use the larger muscle groups such as hopping, running etc
Fine more - use the smaller muscle groups such as writing, knitting etc.
Motor skills are like milestones e.g you can hop, run, hold a cup etc.
Motor coordination invoves combining all these skills together to control activities. For example: knitting invovles holding the knitting needle and then manipulating the needles to make a scarf. This involves motor coordination. Another example is playing sport where you have to bounce a ball, use your reflexes, think and plan etc. You are coordination all your body.