USERS

I have been running a WordPress site for a few weeks now.

I am very confused about one particular issue.
And recently i have turned my site into a Multisite Network and this issue is causing me a lot of grief i wonder if there is any one out there who can clarify this issue for me.

On my site i have been getting a lot of ‘New Users.’
Firstly I would like to to know what is a ‘New User’?
Is it someone who trys to login and creates a new login ?
How are they creating these new user accounts when i don’t have an option in my menues to create a new user?

These New users that have been appearing don;t seem to be real people either.. as when i have attempted to contact them their emails don’t exist.

Now that i am setting up a Multisite Network I am to either allow users to register stores with in my site or allow stores and so on… but i still can’t for the life of me even find out how someone becomes a ‘user’ on my site…???

I would have liked to create a button in my menu to ‘apply to hold a store within my network’ but i don’t seem to have any understanding of this side of my site.

Any help would be great!!

Signed ‘IN THE DARK’