Think of a skill that you are good at and that you use every single day.
You never heard of the skill or had a desire to learn of it until that point. This is the first stage: You know nothing about it.

Example: When you want to learn a new language which you don't know anything about it.

Once you have heard of the skill, you begin to delve into it. This is the stage where you feel learning is slow, and you’re also aware of your mistakes.

Example: You are learning the basic information about the new language. Alphabet, numbers, vocabulary. You don’t have all the information but you are increasing your level of knowledge.

You know pretty much everything you need to know. At the same time, though, you are also aware that you need to focus and concentrate on what you are doing. At this stage, learning can be even slower than the previous stages. The learning isn’t consistent, nor is it a habit yet.

Example. You know the basic information but you don’t feel comfortable to show your knowledge. You’re afraid to make mistakes.

By this stage, you’ve made it. You know everything in and out about the skill. It’s become a habit, and you don’t need to concentrate. You can relax and let your unconscious mind take over.

Example: You got experience through practicing so you feel comfortable.