boys in their teens who signed up with a master for around 7 years. They would work hard for the master during this time in exchange for learning the craft plus food, clothing, and shelter.
Once the apprenticeship was complete, he became a Journeyman. As a Journeyman, he would still work for a master, but would earn wages for his work.
The highest position of the craft was the Master. To become a Master, a Journeyman would need the approval of the guild. He would have to prove his skill, plus play the politics needed to get approval. Once a Master, he could open his own shop and train apprentices.