You are allowed to use the template for any number of projects and for any number of clients.
You can sell a unique website design that's based on a free template to a client. But you cannot redistribute, resell, or license a unique website design that's based on a free template.
What you can't do
You can't redistribute, resell, lease, license, sub-license or offer a free templates as-is or any individual component of the free template to any third party or marketplace.
Ownership
Zerocodegirl retains ownership of the template but grants you the license on the the terms above.
If a breach in this license is discovered, Zerocodegirl may take legal action. Webflow may also take administrative action such as closing your account.