The employer sees your profile first and if they're interested enough to consider you, they request to view your uploaded CV, because employers can’t have access to your CV unless they decide to access your contact information.
That's why the more information you provide in your profile, the higher your chances of having your application viewed. A complete profile can lead you to opportunities even if you haven’t applied for a job. If your profile grabs the employer’s attention while they’re searching our database, they could contact you.