According to research, which pricing strategy has been shown to increase sales more effectively than traditional whole-number pricing?

Pricing strategies are a fascinating blend of psychology, economics, and marketing. Retailers and brands carefully calibrate their prices to influence consumer perception and purchase behavior. One particularly effective pricing tactic has been scientifically proven to boost sales significantly more than others. Test your knowledge about this powerful psychological pricing phenomenon that retailers worldwide leverage to maximize conversions and revenue.

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Charm pricing (prices ending in 9, like $19.99)
Prestige pricing (rounded numbers like $100)
Bundle pricing (multiple items at a single price)
Dynamic pricing (prices that change based on demand)