Product failure occurs when a product does not meet the needs or expectations of its target market, leading to poor sales and ultimately discontinuation. This can happen due to various reasons, such as inadequate market research, design flaws, or ineffective marketing strategies. When a product fails, it can result in significant financial losses for companies and damage to their brand reputation. Examples of product failure include New Coke, which was rejected by consumers, and Google Glass, which struggled to find a practical use in everyday life. Understanding the reasons behind product failure can help businesses improve future offerings.