The document discusses the importance of learning Hadoop due to the explosive growth of big data, predicting that by 2020, global information will reach 40 zettabytes. It highlights Hadoop's advantages, such as speed, flexibility, scalability, and cost-effectiveness, and emphasizes the increasing enterprise adoption of Hadoop, which will lead to better job opportunities in the future. The conclusion urges individuals to learn Hadoop now to capitalize on these trends and prepare for a career in data science.