Data science is a multidisciplinary field that involves extracting insights and knowledge from complex and often large sets of data. It combines statistics, computer science, and domain expertise to analyze and interpret data in order to make informed decisions or predictions. Data science typically involves collecting, cleaning, organizing, and analyzing data using a variety of methods and tools such as machine learning, data mining, and visualization techniques. It is used in a wide range of industries and applications, from finance and healthcare to marketing and social media.