Web hosting is using computer disk space for your website and email addresses. Large data centres provide this disk space on servers and manage the system to keep your website continually visible 24/7/365.
Of course you can make your own computer into a server, but managing it to be online 24/7/365 can be costly.
We charge for the actual disk space used and provide unlimited bandwidth (monthly traffic).
Hosting space is needed for your
1) website content: files, images, databases
2) email accounts: email left on the server (common when using mobile phones)
3) logs of access and activity (can be deleted periodically)
See the following pages of hosting tips.