Final answer:
The special symbols on Best Buy product tags are QR codes that serve as digital marketing tools to engage customers through technology by linking to additional online content.
Step-by-step explanation:
The special symbols on product tags that users can scan with a mobile phone to access product details and competitive reviews at Best Buy is an example of a digital marketing tool that engages customers through technology. These symbols, often referred to as QR codes, link the physical product in the store with online content to create a more interactive and informative shopping experience. By using these symbols, businesses can capture customer attention and provide vivid, personal, and concrete communications that are effective in persuading and informing their customer base.