At what altitude are satellites?

Excuse me, could you please elaborate on the altitude at which satellites typically orbit? Are there different altitudes for various types of satellites, such as those used for communication, weather forecasting, or scientific research? Is there a specific range or ranges of altitudes that are common for satellite deployment, and if so, what factors might influence the selection of a particular altitude for a satellite's orbit? Additionally, are there any safety considerations or regulatory guidelines that dictate the minimum or maximum altitudes for satellite orbits?