Data Science is a field in computer science which uses scientific methods, processes, algorithms and systems to extract knowledge and insights from data in various forms, both structured and unstructured. Modern data science is a multidisciplinary field, which brings together techniques from computer science, statistics, and applied mathematics to analyze data and extract insights from that data to gain some actionable outcomes. Data science involves preparation of data, which may include cleaning, transforming, and normalizing the data to remove errors, inconsistencies and missing values, model building, model validation, forecasting, prediction, algorithm creation, big data analysis, data mining, statistical analysis, descriptive analytics, prescriptive analytics, and machine learning, which are all used to extract knowledge and insights from data.