Quick run through Tomb of Giants before over complicating...
Overlord Generating Creep for Movement and Creep Tumors
How to use your Overlords to generate creep and give your army the advantage. Zerg units in StarCraft 2 move faster on creep and you can use your overlords to quickly release a "creep highway" for them to travel on.
When to Use:
If you have a land army it is highly advised to generate creep wherever you can on the map that your units might walk to or where you might want to construct structures.
[What to do]
Use your overlord and press 'G' to generate creep. Move your overlord to the desired location where you'd like them to generate the creep.
[Tips for Pulling This Off]
Move your overlords out of your base and to your expansions separate by a little less than their creep production range. One big tip is to generate creep to build crawlers at an expansion before the hatchery is finished building.
Good vs. These Races / Strategies:
Bad vs. These Races / Strategies:
This is great if you have a land army and are looking to move faster or expand to a certain area. It also gives you the ability to scout with your units.
This is bad to use if your opponent has map control or fast moving air units to harass your Overlords. Your overlords will likely be taken out in the event of that.
What to do in Success:
What to do in Failure:
Keep the overlords there and potentially bring more in to expand your creep area.
Pull your overlords back if they are repeatedly getting killed.
Enables the Terran units to load other units for transport.
While activated, the Overlord excretes creep onto the ground. The creep only generates while the unit is not moving.