A "Story" difficulty level was added for players who want to focus on the lore and exploration rather than the deep tactical combat.
For a closer look at the gameplay and changes in this version, check out these playthroughs and guides: Divinity: Original Sin 2 Definitive Edition part 43 YouTube · Kurushinad Divinity.Original.Sin.2.Definitive.Edition.part...
Based on the title structure "Divinity.Original.Sin.2.Definitive.Edition.part...", you appear to be looking for a feature or summary covering the core enhancements found in the of this acclaimed RPG. A "Story" difficulty level was added for players
The inventory system was updated to allow for party-wide management, and the quest journal was redesigned to be more intuitive for tracking multiple storylines. Divinity.Original.Sin.2.Definitive.Edition.part...