Hybrid Cloud solutions are a Cloud solution for data storage that involves storage across multiple Public and Private Clouds and on-premise storage, typically in a scale-out style to maximise the use of the storage that you have available, but allowing for more storage to be added or removed as needed for your business. There are different advantages to each of the services provided as well as to holding your data on-premise. However, with Hybrid Cloud, you will be able to seamlessly move your data between public and private Clouds and on-premise storage.
Public Clouds such as Amazon Web Service, Microsoft Azure, and Google Cloud Platform are generally widely used and remotely operated. Public Clouds are known as such because they are a single platform that can be used by many users at once without exposing your data to anyone else. These services can be more economic than private or on-premise storage, depending on the tier and accessibility requirements. However, do not expect to move all production workloads to a public cloud to reduce costs. They can also experience higher latency and as such as not as suited for some critical workloads. Public Clouds are also ideal for sudden or unexpected workloads that might crop up at any given time, such as doing big data analytics.
Private Clouds are usually actually just PaaS or IaaS, and only a few private Cloud providers set up a system that can be billed by the hour in the same way a public Cloud provider can. Private Clouds can be used to store critical or sensitive data that might have data sovereignty rules that require the data to stay within the international borders of the company, such as legal or health information. It may also not want to broadcast to a broader group of people that might have access to your public Cloud such as unprivileged individuals and clients that might be sharing the Cloud. Private Clouds in the same country may also have lower latency, making any workloads stored in the Cloud much efficient to access without compromising privacy.
Hybrid Cloud can also interface with on-premise storage for the maximum efficiency when attending to critical workloads that require no latency such as developing applications, however its ability to store data between several different Clouds in an efficient manner is the main draw of using a hybrid Cloud.