The AWS platform is an offering from Amazon and by far is considered the industry leader in this segment. It is available in 190 countries around the world and is used by hundreds of thousands of business and governmental bodies around the world.
Computing mindset for the 2010s
Cloud computing took off in the decade of 2010s. Up until then, when people wanted to run an application, they had to buy computers, databases, switches, network, domains, software, hire IT staff to deploy and maintain anything on the internet. This is similar to learning everything about electricity before you can learn to turn on and off the power switch. Cloud computing changed all of this and allowed developers to build things on the internet without having to worry about hardware and networking.