Just to see if you really understand your company, and your ability to express your idea efficiently.
Also because it's a reference letter, your boss (in this case, yourself) needs to write about your personality, your strength, and what make you a good candidate for the new company you're applying to.
The boss also need to describe the company in general, as well as describe your duty in the company, and then he or she will need to make the connection between your strength and your role in the company, therefore demonstrate what you had offered to the current company, and by extension, what you can offer to the new company.
The single most important thing in the reference letter is "What can this guy do for us that no one else can?"
5 lines to describe company I would like my students to write: 1) Who we are 2) What we do 3) Our core values - 3 points 4) What we want to achieve 5) Our commitment to our clients
However, administrators are all seeking different things, so what I want from my students will be different from what your teacher wants from you.
Good luck :)
Imperium Fleet @ Star Citizen
http://forums.starcitizenbase.com/