Many large companies have a large number of business trips, meetings, group building, receiving customers and other needs every year, so they usually sign agreements with major hotels to help their employees or customers get more discounts, which is what we call Marriott Hotel Agreement Price.
Agreement codes are usually limited to employees of the contracting company. When you check in, you may be asked to provide the employee certificate or work permit of the relevant company, and sometimes you may be asked to send an email to the front desk to confirm the identity of the employee or customer.