Oh and let me resolve 1 misunderstanding: Its conversion... not conversation xD
Conversion is a marketing word... its about making an extra 'click' which could lead to more loyal customers.... which might eventually pay you....
(If you sign up on a free website and subscribe for their newletter, then you give them extra ways to reach you and persuade you)
@Edit: ...

(5 is the max right?)
I just re-read the email of my teacher... i did actually make it!

(It was only a few hours to late, so he's counting it as the second chance.)