Page URL is... (examples)

URL in browser: https://www.domain.com/
Setting: Page URL is: domain.com
Result: Success! https:// and the www-subdomain are ignored so there's a match
URL in browser: https://sub.domain.com/
Setting: Page URL is: https://domain.com/
Result: Faillure! https:// is ignored however the subdomain sub is missing so there's no match
URL in browser: https://www.domain.com/?parameter=value
Setting: Page URL is: domain.com
Result: Faillure! This rule looks at the entire URL and there should be an exact match. Because the setting does not contain the parameter there is no match.