I love the top view because it shows you exactly what it looks like to be standing on Mars. Since the Martian atmosphere is dusty, natural lighting on Mars is dingy and tends to be a kind of dirty yellow-tan.
The middle three pictures are magnified portions of the larger panorama.
The bottom pan is the same image, reprocessed and white-balanced to show what the colors would look like in Earth’s atmosphere, with our whiter, brighter sunlight. Many photos from Martian rovers have been white-balanced like this, because it helps researchers bring out details and study rocks with the colors they’d be on Earth (making them easier to compare with known rocks).
The background isn’t clouds; I think it’s the rim of Gale Crater in the distance.