Zerg Originates from Blizzard's game Starcraft where zerg were one of 3 playable races, aliens like appearance, Zerg were characterized by using large numbers of weak units to swarm the enemy, also another characteristic of Zerg were that everything was organic, ie, Zerg didn't used machines or any artifacts, they would mutate their own buildings from special kind of larvae and advanced units were created by mutating basic ones. Units were cheap to make and it was possible to make extreme numbers in short period of time. Urban dictionary ^[1] This article covers battle schemes in the game "Starcraft". It does not cover how to defend your base or how to properly distribute your workers.

[edit] Steps

Remember, Zerg have the strength of numbers, not power or ability.
Devastating an enemy base can be done by first sending in several waves of Zergling and Hydralisks. Their defense system will be distraught. Try to destroy lots of missile turrets and continue to send in reinforcements. Send in some Ultralisks to provide distraction.
Send in swarms of Scourges to destroy any air units. Remember to bring in a few Overlords as detectors. You can also use Spore colonies by setting up a nearby base.
Set up a hatchery nearby to better reinforce your units. Build some creep colonies and mutate them to fit your needs. You may have to adapt your techniques depending on the situation.