Spatial resolution -what is it, and what's great about drones?

What does spatial resolution mean?
When talking about image resolution, most people are referring to spatial resolution. This is the amount of detail that we can see when zooming in to an image. We often call this the pixel size, though the more correct reference is ground sample distance or GSD.

All digital images are made up of pixels – picture elements – that you can see as coloured squares when zooming all the way into an image. In a drone image, each pixel represents a square of land or sea on the surface of the earth. It’s the size of that ground representation that’s called the GSD, and often referred to as the spatial resolution. With drones, we usually measure this in terms of centimeters per pixel, compared to satellites at meters and sometimes even kilometers per pixel.

Read on here https://geonadir.com/drone-resolution/#:~:text=In%20a%20drone%20image%2C%20each,to%20as%20the%20spatial%20resolution.