When you think about bacteria, the first thing that comes to mind might be diseases. But in reality, many types of bacteria are actually beneficial. They are important for your health as well. In fact, you can’t live without them at all! Bacteria may be too small to be seen with the naked eye, but they’re still powerful enough to change your life. Bacteria are present everywhere, with billions of them living in various environments. Each type of bacteria has its own unique function.