While input buffering happens behind the scenes and may not be something that players are always thinking about, it’s pretty obvious when it’s absent and something goes wrong. The mechanic lets players queue up their next ability while they’re in the middle of an action so that it goes off as soon as possible afterwards. Pathing towards someone to use your ultimate and having the spell go off right after you Flash is an example of this, something that’s a core part of certain champions’ kits when it comes to pulling off flashy combos.
Riot Meddler gave a more precise example of input buffering in a Gameplay Thoughts post that involves a popular Lee Sin combo.
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