Why Do Some Countries Have More Than One Head of Government?

Imagine a school where the principal, vice-principal, and even the head of the math department all have to make decisions about what happens in the school. In some countries, it’s like that, there are multiple people who act as heads of government, each with different jobs. Some countries split the job so that one person focuses on running the country every day (like a prime minister), and another focuses on bigger things, like representing the country to other nations (like a president).