The "IGNOU MNM 033 Data Science and Big Data" study guide is meticulously crafted to meet the academic needs of students enrolled in the Indira Gandhi National Open University (IGNOU), offering an in-depth exploration of data science and big data concepts and methodologies. Tailored specifically for IGNOU students, this guide navigates learners through the theoretical foundations, practical techniques, and ethical considerations involved in working with large datasets and extracting insights from them. Covering topics such as data collection, data preprocessing, data analysis, machine learning algorithms, and data visualization techniques, it equips students with the knowledge and skills necessary to tackle real-world challenges in data-driven decision-making. Through a combination of theoretical insights, practical examples, and hands-on exercises using relevant tools and software, this guide empowers IGNOU students to develop proficiency in data science and big data analytics, enabling them to pursue diverse career opportunities in data-driven industries, research organizations, and governmental agencies. By fostering critical thinking and problem-solving skills, this guide prepares IGNOU students to leverage the power of data science for innovation, problem-solving, and societal impact in the digital age.