In Diablo 4, players have the option to salvage gear and items instead of selling them for cheap D4 gold. With the abundance of loot available from various sources like completing quests, opening chests, and defeating enemies, not all the items found in Diablo 4 need to be salvaged, as some may be upgrades that can be equipped immediately.

To salvage items in Diablo 4, players can visit the blacksmith in any city. There are three options for salvaging: selecting items individually, salvaging by rarity (Common, Magic, or Rare), or salvaging all items in the inventory at once. Players can also mark items as junk by pressing the space bar on PC and then choose to salvage them.

To salvage an item in Diablo 4, players need to click on the "salvage item" button depicted by a pickaxe icon at the blacksmith and break down the unwanted items. However, it's essential to be cautious as there is no way to retrieve an item once it has been salvaged mistakenly.

Article From: https://www.xtmmo.net/diablo-4/