What main information can QR codes store for users?

QR codes are primarily designed to store and convey information quickly and easily, and one of their most common uses is to encode URLs and other web addresses. This feature allows users to scan a QR code with a smartphone camera, which then redirects them directly to a specified webpage without requiring them to manually enter the address. The ability to store URLs makes QR codes particularly useful for marketing, as businesses can direct customers to their websites, promotional pages, or online stores with a simple scan.

While other options do represent information that can be stored or conveyed through digital means, they are not the primary function of QR codes. For example, social media text messages can be shared through specific links or shortened URLs, but QR codes do not inherently store such messages directly. Similarly, while QR codes might relate to product prices or inventory in specific applications, their core strength lies in linking directly to web addresses or pages. Lastly, QR codes cannot store large files like images or videos; they function effectively with small amounts of data, making URLs their most practical usage.