How do you share knowledge within the team?

I have a question that’s not really technical, so I hope this is the right place to ask.

I work for a corporate company on an important project, and I have a teammate who is at the same level as me but has less technical expertise. My boss has asked me to share my scripts and backend programming with this person so that they can take over in case I leave the company in the future

Is this a common practice in the industry? How do others handle knowledge sharing in similar situations?