Minecraft wiki entry for Player_versus_Player, associated text: W-tapping is a technique where the player taps W right after hitting their opponent. W-tapping resets a player's sprint and increases the knockback dealt to the opponent. This makes it harder for the opponent to hit back as the enemy would be constantly knocked back, and backwards momentum + server delay (ping) makes a deadly combo. Despite popular belief, W-tapping does not increase your attack reach, but gives the illusion of it, as 1. a knockbacked player's backwards momentum makes it harder for them to get within range and hit, and 2. With server delay, it is quite likely for a player to get hit from a delayed attack after being knocked out of normal range, and this could happen repeatedly which makes the player seem like they have longer reach from their opponent's perspective.