Webnode Forum

I have smithmansion.org. I created the site with the intent of making it viewable to everyone without signing up or signing in? Now, I would like to change that. Is there a way for new users/visitors to sign up to view my website so I can better track my visitors and customers? I tried the security function, but no one has the ability to sign up into the site, only registered administrators, if I read it correctly?