Zoom is a marketing ploy, aimed at casual consumers:
If a lens goes from 10mm to 100mm, it is a 10X zoom. A lens that goes from 1mm to 100mm would be 100X zoom, despite having the exact same magnification power as the 10X zoom. A lens that went from 400mm to 800mm would only be a 2X zoom, but would be 8 times more powerful than either of the others.
I bet you’d reach for the 100X zoom though, wouldn’t you?
What really matters is the focal length. This is stated to be 2000mm, which is both impressive and excessive. At that focal length, you need a lot of light to get good results (to keep the ISO low, and the shutter speed high), and this thing is stuck at f/6.5, which is really bad for anything beyond 200mm.
Still an impressive feat, yes. But this is mostly a marketing ploy, and it’s working well. You will get a lot of crappy shots at 2000mm, even just from air diffraction, never mind lighting issues, shutter speed, ISO noise, and shake.
I would pit my 600mm f/4 against this 2000mm joke any day!