There is no such thing as unlimited hosting per se. Because hard drives are always made with a limited number of gigabytes or terabytes. What unlimited means is that it is not exactly measured in kilobytes, megabytes and gigabytes, and that there is actually complete freedom. But there are some other kind of restrictions in effect, such as the number of files.
First of all, let's explain what shared hosting means in brief.
A person rents a server in a data center ( Google data center ) it implies that he bought some configuration (same as when you buy a desktop or laptop computer). What differs from your computers and servers is that you rent the server connection immediately, cheap servers have connections from 100 mbps to 500 mbps.
On that leased server, create packages and divide the hard disk into accounts of 2gb, 5gb and so on.
What does unlimited space really mean?
Unlimited hosting actually means that you don't have to worry about megabyte details, but you should definitely take care of how much your account takes up for security reasons. Another problem that can occur is that the site becomes slow because it contains unnecessary data, the database becomes huge and slow, and all in all it can lead to very poor performance. It's the same thing with emails, searching and sorting/analyzing emails will be hampered if they are uncontrollably filled with data.
What does unlimited monthly flow mean?
Unlimited monthly traffic means you don't have to worry about how much traffic is transferred from your account. Every time a user opens your site, he gets some traffic. That way you can have unlimited visits from that point of view. But it can cause other problems, for example if someone steals your images or content from your site, if you have unlimited traffic it will be harder for you to notice these things.
