Is walking a mile in 25 minutes good?

I'm curious to know, is walking a mile in 25 minutes considered a good pace? For someone who's aiming to improve their fitness or just maintain a healthy lifestyle, would this be an effective way to exercise? Are there any benefits or drawbacks to walking at this speed? I'm also wondering if it's a reasonable pace for beginners or if it's more suited for those who are already in good physical shape. Any insights or recommendations would be greatly appreciated.