The main objective it to produce more drugs. The bigger your drug production rate, the higher you are on the rank (therefore, will recieve a bigger portion of the funds of the daily round)

To reach that objetives, you use your resources (drugs, weapons and alcohol) to build and improve your buildings, increasing the production rate, and the max amount you can store of each resource.

Alcohol and weapons are also used to recruit troops, which you can use to attack other players, and steal some drugs.

From what i have read around, the steem distributed on the game com from two sources:

• Rewards from @drugwars posts
• Part of the steem people use on the game to accelerate the constructions