Empty title (non-empty-title)
The <title> element is not blank and exists within the <head> section.
No title:
This page has no title element.
The <title> element is not blank and exists within the <head> section.
No title:
This page has no title element.
Note: Possible to automatically test. An automated test can be performed by checking that a (non-empty) <title> element exists within the <head> section.