The Dragon Isles are the main setting of Dragonflight, and are separated into five zones. The four main zones are the Waking Shores, Ohn'ahran Plains, Azure Span, and Thaldraszus, with the neutral city of Valdrakken in Thaldraszus serving as a hub. The fifth zone, the Forbidden Reach, also serves as the starting area for the Dracthyr race.
Dragonflight raised the level cap to 70, the first increase since the level squish in Shadowlands. Dragonflight also features a revamp of the user interface and talent tree systems, with two tree branches.
Dragonflight includes a new playable race, the Dracthyr, and a new class, the Evoker. The two are combined: Evokers are exclusive to the Dracthyr, and are also the only class that Dracthyr can play. Dracthyr Evokers are also considered a hero class: they start at level 58 and have a unique starting zone.
Dragonflight features a revamp to the game's profession system, allowing players to place work orders where they can commission the creation of items.
The game introduced a new feature called Dragonriding, allowing players to raise and customize a dragon that they will be able to use in a new momentum-based flight system using aerial skills. Flying is available from the start of the expansion, without the need to reach the maximum level.
Source: Wikipedia, "[en.wikipedia.org/wiki/World_of_Warcraft%3A_Dragonflight World of Warcraft: Dragonflight]", available under the CC-BY-SA License.