When you are ready to share your form with the world, then click on the "Share" tab. Here you will see various options to share your form.
Your neetoForm must have been published before you can share it.
You can copy the link to your form, and you can share that link. You also have an option to "Embed" the form on your website. For that click on "Embed in a webpage" and follow the instructions there.
You can also share the form on social media using the links. The last icon gives you a QR code which you can also use to share your neetoForm.