It goes like this:
You make a sentence with the five letters that the person before you posted.
The next person has to make a sentence using just the five letters.
Let's pretend the letters before me were A B C D E
So my sentence is
A brown car drove east
Next up:
S T E E M
Steemit turns earning easily manageable
Next up:
S H A R E
Steemians has a rare experience
next :
S T O N E
Some Try Only Nagging Effectively
next:
B R A N D