The PvT match-up has taken a bit of a 180 since Heart of the Swarm, where Terran players commanded the early and mid-game and tried to stop the Protoss late game army from ever being assembled. Nowadays it is the other way around, with the power of Liberators Terran players find themselves quite comfortable with the game continuing to a later stage and it's the Protoss players who look to be aggressive early and to create a strong foot-hold for themselves before that late game comes around.
This build looks to do exactly that : be aggressive early with not one but two waves of aggression while back at home following up with upgrades and furthering your tech tree so that you are ready to defend a third base and move into the later stages of the game.
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