Bo1 / Bo3 / Bo5“Best of”: a single game, first to 2 wins, or first to 3 wins.SeriesA whole Bo3 or Bo5, i.e. several games between the same teams.SeedPlacement, e.g. “LCK #1” is Korea's champion.Play-InQualifiers before the main event for lower-seeded teams.Swiss StageSwiss system: you play teams with the same record. 3 wins to advance, 3 losses and you're out.GSLA 4-team group format with a second chance for losers.Draft / pick & banBefore each game the teams take turns banning and picking champions. Half the win is decided here.FearlessIn a series, a champion that has already been picked can't be picked again.PatchThe game version. Worlds 2026 is played on patch 26.20.MetaThe strongest champions and strategies on a given patch.GankA surprise attack on a lane by the jungler (or another player).TeamfightA fight between teams, usually 5v5.Baron NashorThe strongest monster on the map. Its buff helps close out the game.Dragons / SoulElemental dragons give permanent bonuses; 4 dragons grant the Dragon Soul. The Elder Dragon is a huge late-game buff.Grubs, Herald and AtakhanOther map objectives that help take towers and build a lead.CS / farmMinions killed, the main source of gold.KDAA player's kills / deaths / assists.Gold diffThe gold difference between teams, the clearest sign of who's ahead.ThrowLosing a winning position through a mistake.BackdoorQuietly destroying the Nexus while the enemy is elsewhere.MVP / POGThe best player of the match or game (Player of the Game).RosterThe team lineup: 5 players, subs and coaches.VODA recording of a broadcast to watch later.Co-streamA match broadcast on a streamer's channel with their commentary.