Event organizers have used QR codes on tickets for years to speed up entry at concerts, sports events, and more. The same idea works for ID badges at events, companies, or institutions, helping control staff and visitor access. But these badges can also be a smart marketing tool. For example, a dynamic URL QR code on an employee’s badge can link customers to your online store. A Link Listing QR code can boost your social media followers. Or, an Apps QR code can promote an app download that offers exclusive benefits. All of this can be done quickly and easily with just one scan.