Your anonymous resume gets listed in the resume bank for employers to view. They will see everything you put in except for your name and contact information. When an employer reviews your anonymous resume and decides they want to consider you for an opportunity, they will construct a position overview that will be emailed to you and placed in the "My Contact Requests" section of your account. You will be able to review the opportunity and decide whether you want to be considered for the position.
You can read more about contact requests in this supplementary article:
You can also use your resume to apply for job postings currently posted on the job board that have Job Board Application enabled (if offered, this will be an option when you hit the "apply" button on a job ad).