The consumer is staring down the 50-yard aisle, lined solid on both sides with things to buy. Some are yours, some are your competitor's. They know what they need, but not yet what they want.
 
Shelf danglers and talkers are a proven Point-of-Purchase (POP)/Point-of-Sale (POS) staple to catch the eye of the consumer as they move down that aisle. It then draws them in to pause and consider your message and product.