Tuckman's stages of group development is a way to explain how groups of people work together in teams. It says that all teams go through four stages when they start working together.
First, there's the forming stage. This is when the team first meets each other and starts to get to know each other. At this stage, people are polite and excited to be working together.
The second stage is called storming. This is when the team starts to disagree and argue. People may have different ideas and there can be conflict as the team tries to figure out how to work together.
The third stage is called norming. This is when the team starts to understand each other better, come up with solutions to their problems and work together better.
The fourth stage is called performing. This is when the team works together like a well-oiled machine - they trust each other, listen to each other and solve problems quickly and efficiently.
These four stages help teams understand how to work together effectively.