Biosafety is about making sure that when people work with certain things, like germs or substances, they stay safe. To keep people safe, you have to be careful about how you work with certain things. In a biosafety setting, things are usually contained so that people and the environment are not exposed to anything dangerous. It might look like people wearing special suits or being inside a special area so that the germs and substances can't get out. Biosafety is important to protect people's health and the environment.