New Content and Features

• New Festivals and Events: Added the Desert Festival, Trout Derby, SquidFest, and a new environmental event in summer.
• New Farm Type: Meadowlands Farm, which includes a coop and two chickens.
• NPC Dialogues: Expanded dialogues, including custom gift reactions and dynamic dialogues.
• Multiple Pets: Players can now have multiple pets after maxing out hearts with their starter pet.
• Ginger Island Map: A new world map for Ginger Island that shows real-time positions.
• Winter Outfits for NPCs: NPCs now have winter outfits.
• New Items: Big Chest, Dehydrator, Mushroom Log, Bait Maker, Heavy Furnace, and Fish Smoker.

Bug Fixes and Improvements

• Gameplay Adjustments: Bee houses now work with flowers in garden pots, and the gold clock can be turned on or off.
• Translation and Localization: Improved translations and added options for different fonts and font sizes.
• Crash Fixes: Addressed various crashes, including those related to NPCs and specific events.

In short - a lot.

https://www.stardewvalleywiki.com/Version_History

EDIT: Sorry, that is far from “high level”