After sales support is crucial for the following reasons: 1. Customer Satisfaction: Ensures that customers are happy with their purchase and can effectively use the product. 2. Product Longevity: Regular maintenance and upgrades help in extending the life of the nanotechnology products. 3. Trust Building: Effective after sales support builds trust and encourages repeat business and word-of-mouth referrals. 4. Feedback Loop: Provides valuable feedback for future product improvements.