From Bethesda Softworks:
Seasons of the Worm Cult
In this two-part adventure continuing ESO's original main quest storyline from 10 years ago, the dreaded Worm Cult has returned and is threating the island of Solstice, concealing their activities behind the massive and magical Writhing Wall. Players arrive on the tropical island in Seasons of the Worm Cult Part 1 to explore the Western Solstice zone—there is no shortage of action and rewards to uncover with new World Bosses, Delves, a Public Dungeon, and a brand-new Trial: the Ossein Cage.
Subclassing
With the new Subclassing system, all ESO players can further customize their characters and play their way. Now, players on all platforms may utilize the powers of up to three of ESO’s seven classes at once, offering greater flexibility and creativity in gameplay. See Subclassing in action below:
Hero’s Return
Also free with this update, the Hero’s Return feature automatically detects when players haven’t logged in to ESO for an extended period and offers them handy tools and guidance to help get back into the thick of things more swiftly. The first of these is a brief, optional adventure you can choose to complete to help refresh your combat skills and secure additional rewards.
Update 46 introduces additional base game quality-of-life improvements, including an updated in-game map—making traversing Tamriel easier than ever—and updated tutorials for the Wayshrine system.

