Use the search bar to find a city or draw a "Polygon" (AOI) over your specific area of interest on the map.
It offers a "cloud-native" approach, meaning you can browse, visualize, and even process data directly in your browser before committing to a large download. 2. Understanding the Data Sources download copernicus data
Some older data might be in the "Long Term Archive." You may need to "request" these files; they will typically become available for download within a few hours. Use the search bar to find a city