help please

hello

i want to apply for the QUEBEC SKILLED WORKERS but i have one thing which i can't understand it :
to apply for THE QUEBEC SKILLED WORKERS you have to apply for the CERTIFICAT DE SELECTION DU QUEBEC as they say in their website
but what i can't understand is : in the documents checklist the ask applicants to provide the CERTIFICAT DE SELECTION DU QUEBEC (CSQ) beside other documents.
first i can not understand that Contradiction
second i do not have any idea about where can i get that certificate from ??
if you do not mind could you please tell me where can i get it from
waiting for your answer
thank you so much