web hosting server

I am wanting to change a current server to a new server which will give me better speed for my websites. Which one are recommeded by you? pls give me any suggestions? I am considering to use OVH, Amazon cloud, Google Cloud, Digital Ocean or Online.net...but not sure which one will give me 100%...

I want to hide IP address of my web hosting server? I used Cloudflare for my websites but when I check tutorials on the internet, they are still having ways to reveal real IP from a website. My question is, is there a way to hide IP address that tools can not find out?

Can any one tell me what is the difference between a web server and a web hosting server? which one is more important and why?

If you were to outright purchase a server right now for web hosting and then colocate it what would you buy, where, and what would the cost be?

What are the ways of keeping a shared hosting linux server secure, assuming SSH access is available for every user? I am mainly thinking of securing the shared servers from the users themselves and between themselves together.