Livemocha is the world's largest language learning community with over 5 million members, offering free and paid courses in 35 languages, focusing on interactive learning with native speakers. It emphasizes the importance of social networking and user experience to enhance language learning, and demonstrates tremendous growth in a short time. The document also provides insights and tips for startups, stressing the need to know customers, manage metrics, and create competitive advantages to succeed in the evolving digital business landscape.