The term “Big Data” is everywhere—but what does it really mean, and why does it matter? This beginner-friendly guide breaks down the concept of Big Data and the tools that power it: Hadoop, Apache Spark, and cloud computing platforms like AWS, Google Cloud, and Microsoft Azure. Whether you're exploring a career in data engineering, business analytics, or cloud architecture, understanding Big Data is essential for the digital economy. Learn how companies handle petabytes of information in real time, process streaming data, and build scalable solutions using open-source frameworks. This presentation also explores real-world use cases from industries like finance, healthcare, and e-commerce, making complex concepts easy to grasp.