League of Legends: What Is PBE?

If you want to try out those upcoming content by Riot Games in League of Legends, then qualifying to the PBE would be the best choice.

League of Legends players confused by Riven buffs on PBE Patch

New LoL draft feature discovered in unreleased PBE lobbies to help

Challenges coming to PBE - League of Legends

They need to fix the bot problem in pbe, I've had at least 4 bots

PBE - League of Legends

LoL PBE Patch Notes Preview: Patch 12.14

League of Legends nerfs ganking in 13.14 PBE update

we're castling - PBE Arena Highlight : r/leagueoflegends

HOW TO PBE: Login & Gameplay

League client update] Briefly visiting the PBE for a pre-alpha