Data Structures And Algorithms Data Structures: A data structure is a technique of storing data in a computer so that it can be accessed and modified efficiently. Algorithms: An algorithm is a step-by-step instruction to perform a task. Why Should I Learn Data Structures And Algorithms? Enhance your problem solving skills. Write efficient code that is performant and scalable. Specialized fields: machine learning, data science, artificial intelligence and other engineering fields deal with complex data and require efficient processing.