1. Easy to use and inexpensive at the beginning, no need to handle everything by yourself
2. Fast and effective resource provision
3. resources are highly scalable
4. no waste - because all usage costs are generated according to demand.

1. Absolute control - the company's organization controls the entire platform.
2. No sharing of equipment with others means that there are some cloud requirements that the public cloud providers cannot accommodate. Your private cloud can do it.
3. the problem with landing data, some industry data is highly regulated. It may not be attainable to access the public cloud.