When we go to sleep at night we go out on the astral in our astral body and interact with other people.
Some people thing astral travel is lucid dreaming. Lucid dreaming allows you to control the outcome of what your are dreaming.
Astral travel is your astral body going out on the astral plane to learn and grow from and with others. Who are also there to learn and grow.
As you do more of this work you will become aware that you are going out in your astral body and meet up with others.
You will become meet people you know, or people who are there to interact with you to learn ‘something’ in particular. Some of these people are those who have agreed to help you experience and grow in a particular area.
Some are also learning from the interaction. The more you meditate and tune in to who you are as a spirit in the body the more aware that you go out on the astral.