Lesson Summary: In this video, you will learn about Elastic Load Balancers (ELBs). Specifically, you will learn about the purposes and benefits of ELBs along with the types of ELBs that AWS offers. Finally, you will also learn how to effectively manage application session state using ELBs. These topics will be effective in helping you to develop high-availability applications that rely on EC2 instances. By the end of the video, you should feel confident that you understand what ELBs are, and some of the purposes you can employ them for as well as the options you have for managing user sessions when working with these technologies.