In CivClicker, the player manages a civilization which begins as a hamlet. As citizens are added, they consume food at a particular rate of food per second. When employed as farmers, food is generated to counter this rate. Thus, a stockpile or deficit of food is produced. The same occurs for the civilizations wood and stone, which is used to construct buildings and upgrade the civilization.
Eventually, a player must employ blacksmiths, apothecaries, clerics, and so on, to manage other effects in their empire such as production of metal, illness, piety, and more.
All of these events and statistics are measured in numbers that change each second depending on the status of employed citizen, random events, and - most centrally - the player's mad clicking to manually collect resources and manage the civilization.