This build is designed to counter the popular three Reapers and two Hellions build.
The three Reapers and two Hellions into Siege Tanks, Ravens, and Vikings is the dominant build. The combination of three Reapers and two Hellions provides an extremely strong early game presence, and it is hard to match that without going to the extreme. One doable alternative is to use Reactor Hellions to match opponent’s five units. If you open with 15 Refinery Reaper expand and swap the Factory onto the Reactor immediately, you should have one Reaper and four Hellions to match opponent’s army when they attempt to apply pressure.
The constant Hellion production and Marauders are the key. If the opponent does not know about the Marauders (i.e., an attack is imminent), the standard build does not have what it takes to defend the attack.
You can read more about other details as to how this build aims to deceive Protoss in TerranCraft's May 2019 Metagame Build Orders article.
On July 20, 2019, 1:49 a.m., GreyWolf said:
It's incredible how versatile this build can be.
In mid-game you can switch to full bio, if needed.
You can adapt easy to the TvZ meta.
It's a bit harder against Protoss, but still viable.
TY is a genius.