What is site wide password protection?

I get the website password but don’t understand site wide password protection.

Probably to hide the staging domain in case you’re doing a project with things / information that shouldn’t be open to the public before finishing the site.

No, that’s the website password like I show here, https://bloggingaboutproducts.webflow.io/ which nobody can’t get in and nothing gets out. But the site password protection is part of the pro account plan and I pay for the free account plan, so I don’t get a chance to use it.

Click to this link: https://www.youtube.com/watch?v=ElHYS4AkIjs&feature=emb_logo to understand what this is, if your interested