An instructor level certification is the highest you can go in your diving certifications. Some training agencies offer instructors different levels of certification that they can go through, but it all focuses on the instructor position. An instructor is a leader and must conduct themself in this manner. Once you become an instructor, you can work at a dive shop, resort, club, etc. and teach individuals how to scuba dive. Consult your local dive shop or training agency for course requirements and expectations.
Instructor certifications require specific prerequisites, and these prerequisites differ amongst training agencies, so it’s important that you contact your local dive shop or training agency to find out everything you need to know before signing up for a course.