The document presents recommendations for Decathlon's viral marketing strategies. Decathlon is a 40-year old French retailer known for its own brands and covering every sport at low prices. It has potential for growth but currently relies on traditional advertising. Viral marketing uses digital media for maximum exposure. Recommendations include sporting blogs for user engagement, search engine optimization, sponsoring athletes, and an interactive virtual fitting room for mobile apps and websites. The goal is to increase Decathlon's online presence and follower base on social media platforms.