Work in progress
The Meta Tag support by the Snap! system includes the Page Title Meta Tag.
In generally, this option is not necessary because the <title> tag is already present on all pages. However, the title meta tag is different.
The <title> tag is defined as:
In comparison, the Page Title Meta Tag only includes the title of the page (first bullet point.)
The title is automatically added to your meta tags when the dc.title meta tag is turned on.