I bought a few pairs of "weatherproof" boots, which happen to be suede.

Questions:
1. What does weatherproof mean?
2. Do I need to further weatherproof them by using a waterproofing spray?

Also, this is my first rainy season wearing nice leather shoes. Should I spray those as well? What happens to leather if I don't? (I asked around and few of my friends weatherproof or waterproof their leather shoes.)

For background, I'm in the SF Bay Area. We get some rain, but not like Seattle. However, when it rains, it does sometime pour.

thanks!

ETA: And if you buy regular suede shoes, like those Sam Edelman Petty booties, do you spray those as well, regardless, just for extra protection?