Microbial intelligence is the idea that bacteria and other single-celled organisms can act intelligently and make decisions, like humans do. This means that, even though these organisms are very small and don’t have brains like humans do, they can still figure out ways to survive and reproduce. For example, bacteria can sense their environment and decide where to move, what to eat, and when to reproduce. They can also remember past experiences to better prepare for the future. It's amazing that something so small can be so smart!