A common use of QR codes in marketing is to provide quick access to information or promotional content. Marketers often incorporate QR codes into advertisements, flyers, and packaging, enabling consumers to scan the code with their smartphones for instant engagement. This leads to increased interaction with brands, as users can access websites, videos, or special offers without manually entering URLs. QR codes can also track user engagement and provide valuable metrics, making them an effective tool for enhancing marketing strategies and improving customer experiences.