The Comprehensive Ranking System, or CRS, is the Government of Canada’s unique points system for ranking Express Entry candidates based on factors including age, education, skilled work experience and proficiency in English or French.

Eligible candidates can submit a profile into the Express Entry pool, where they are ranked based on their CRS scores.

The Government of Canada regularly issues Invitations to Apply (ITAs) for Canadian permanent residence to the highest-ranked candidates through regular draws from the Express Entry pool and aims to process applications within six months.

source :canadavisa