The main rule is to place a QR code where it is convenient to scan it. For example, in places at the checkout, in menus, leaflets, advertising banners, posters, business cards, letterheads, right on the packaging of goods.
It is also important to remember that:
- The QR code needs to be tested before being sent to print: try scanning it from different devices and from different distances.
- The code must be visible and easy to scan. For example, a QR code on the floor of a restaurant is not a good idea.
- Offer a bonus in return for a review, such as a discount or a gift. A high-quality CTA (call-to-action) like "Leave a review via QR-code and get a yummy discount on your next order in our cafe" will help you with this.