What is Amazon Lightsail?
Amazon Lightsail is the easiest way to get started with Amazon Web Services (AWS) for anyone who needs to build websites or web applications. It includes everything you need to launch your project quickly - instances (virtual private servers), container services, managed databases, content delivery network (CDN) distributions, load balancers, SSD-based block storage, static IP addresses, DNS management of registered domains, and resource snapshots (backups) - for a low, predictable monthly price.
(https://docs.aws.amazon.com/en_us/lightsail/latest/userguide/what-is-amazon-lightsail.html)
Instances (virtual private servers) in Amazon Lightsail
Your Lightsail instance is a virtual private server (also called a virtual machine). When you create your instance, you choose an image that has an operating system (OS) on it. You can also choose an instance image that has an application or development stack on it, including the base OS.
Tutorial: Get started with Amazon Lightsail instances
Use this tutorial to learn how to create, connect to, and use an Amazon Lightsail instance. In Lightsail, an instance is a virtual private server (also called a virtual machine). You create and manage Lightsail instances in the AWS Cloud. When you create an instance, you choose an image that has an operating system (OS) on it. You can also choose an instance image that has an application or development stack on it, including the base OS.
The instance that you create in this tutorial will incur usage fees from the time that you create the instance until you delete it. Deletion is the final step of this tutorial. For more information about pricing, see Lightsail pricing.