how to rate comments?

@feepah (79)
China
April 1, 2009 1:34am CST
how to rate a comment, i am a new and i have no idea yet,and can someone tell me what's the meaning of doing rate,is there something helpful can rating lead?
1 response
@roniroxas (10560)
• Philippines
2 Apr 09
you can see a + and - sign on every response. and a ! too. if you like to give a + sign then that is for the star raiting. the stars shows after you reach the 100th post. if you rate - the star will go down. the ! is use to report something at mylot. i dont use the - sign, and i always use + sign specially on responses that i learned something with.