QR codes are images that, when scanned on a phone, take a person directly to a specific website. They are basically scannable links. Most modern phones can scan QR codes using their cameras, only requiring the person to simply hold the camera in front of a code for a short period and their phone will automatically take them to the website.
Most page son BetterNow have an associated QR code. You can find the QR code by adding “/qr” to the page url.
For a project it could e.g. be https://fundraising.charity.org/projects/our-general-work/qr
QR codes can be sued to share a page on e.g. t-shirts, flyers and any print materiale. Hang them in second-hand show windows and use them in fundraising packages or promotional flyers.