An apprentice is someone who is learning how to do a job from someone who already knows how to do it really well. It's like when you ask your mom or dad to show you how to fold your clothes or tie your shoes.
Most apprenticeships are for jobs that you can't just learn from a book or a class, like making things with your hands or fixing machines. For example, if you want to be a carpenter, you could become an apprentice to a master carpenter.
During your apprenticeship, you will work alongside the master and learn how to do things step by step. You will also learn about safety, how to use tools, and how to follow instructions.
It's like playing a game: at first, you might not know all the rules, but by watching someone else play and asking questions, you'll get better and better until you can play on your own.
Once you finish your apprenticeship, you are considered a journeyman, which means you can do the job on your own but still have more to learn before becoming a master yourself.