Out of the three different races in Starcraft 2, Terran are the most like Humans.  They are descendants of a dreadful colonially exploration that was launched from Earth Centuries before.

The survivors now seek and explore for the expansion of the human race.  Terran dominates with their strength both in industry and ambition, and  have been forced to adapt to a harsh existence of the mostly lifeless world.

Terran are the masters of survival that rely on their military forces and a mix of different units, against the technology advanced Protoss, and natural power of Zerg.  Terran excel in defence where both the bunkers and siege tanks come into their own.  That coupled with their heavily armed battlecruisers and plentiful firepower.

Terran Build Orders