Highlights from this release include visual refreshes for a number of applications, including the desktop itself.
The complete list of features and improvements are in the release notes.
GNOME 3.34 is code-named “Thessaloniki” in recognition of the most recent GUADEC, held this past August in Thessaloniki, Greece.
GNOME 3.34 contains six months of work by the GNOME community and includes many improvements – gnome.org