Items history is a informational page that records the item details and changes in ownership/content/upgrades.
Unique history of an item can have an effect on its reputation and value: old items with established history vs new items.

Example of typical item history:
Item found in Death Canyon Chest #120 by TalkingCrab1242 at 2019.2.11 04:10
Item was socketed with +24 Damage Gem
Item sold to XXGhost0KillaXX at 2019.4.10 12:10
Item attribute +39% poison resistance was upgraded to +44% poison resistance.