What primary function do weight sensors in smart grocery shelves perform that traditional shelving systems cannot?

Modern grocery stores are increasingly using advanced technology to enhance customer experience and optimize inventory management. One of the most innovative developments in food retail technology is the implementation of smart shelves. These digital shelf systems use various sensors and AI to transform how products are displayed, priced, and monitored. Test your knowledge about this cutting-edge retail technology that's changing how we shop for food!

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They automatically detect and alert staff about low stock or empty shelves without requiring visual inspections
They change the temperature of the shelf based on the product's optimal storage conditions
They automatically scan customer loyalty cards when products are removed from shelves
They analyze customer facial expressions to determine satisfaction with product selection