Short introduction to AWS
Amazon Web Services is a cloud offering from Amazon, an online retail giant. Back in early 2000s, Amazon invested money in an automated platform, which would provide services for things such as network, storage, and computation to Amazon developers. Developers then don't need to manage underlying infrastructure. Instead, they would use provided services via APIs to provision virtual machines, storage buckets, and so on.
The platform, initially built to power Amazon itself, was open for public usage in 2006. The first released service was Simple Queue Service (SQS), followed by the two most commonly used AWS services—Simple Storage Service (S3) and Elastic Compute Cloud (EC2) that were released and anyone could pay to use them.
Fast forward 10 years. AWS now has over 70 different services, covering practically everything modern infrastructure would need. It has services for virtual networking, queue processing, transactional e-mails, storage, DNS, relational databases...