What does the vegetation map tell me?

Good evening. I just flew a property for a home inspection and took a few extra photos for them. I clicked on the vegetation / plant health and there were like " what does that mean" . Well how do I interpenetrate this??? there were green spots in the middle of a dead field with no irrigation lines. Is this a credible map or a just a light reference?

Basically uses visual light to identify vegetated versus non vegetated areas. If you’ll notice the roof should be red and if their grass is in good condition it should be close to Green. That’s our bad spots in the garage you should be able to see where they are. It is used mostly for agricultural purposes to identify areas that may be struggling.