A CV, or 'course of life', summarizes your experience, skills, and education, ideally no longer than two A4 pages, though three may be acceptable in Mexico. It should include contact details, education, referees, skills, and relevant work experience, focusing on the sector you're applying to, with a recommended personal profile length of 200 words. It's important to avoid errors, maintain a neat layout, and be honest to enhance your chances of impressing potential employers.