version 1.8.8, released on July 28, 2015, was primarily a maintenance and security update that addressed critical bugs and exploits within the Bountiful Update (1.8) cycle. Key Updates in 1.8.8 Security & Exploits:
Fixed major lag exploits and server crashes, including issues related to banners.
Modern multiplayer servers that require 1.20+ will not allow a 1.8.8 client to connect, but most dedicated "old-school" PvP or minigame servers maintain backwards compatibility.
You cannot tell the story of 1.8.8 without its minigames:
If you want to create stylized text for server logos or banners: Minecraft - Tutorial - /tellraw Command [1.8.8]
And the bedrock cracked.
The movement physics in 1.8.8 differ slightly from modern versions.
It resolved a notable server-crashing exploit and a client-crashing bug.