This lecture introduces Google Earth Engine, a cloud-based platform for planetary scale geospatial analysis. The instructor explains the history behind its creation, the need for such a tool due to the massive amount of remote sensing data available, and how it allows experts in various fields to access and analyze geospatial data for research. The lecture covers the core concepts of Earth Engine, including data types, operations, and reduction techniques, as well as practical examples of how it is used in real-life applications such as vegetation monitoring, water surface analysis, and NDVI monitoring for crop health and climate change studies.