The Amazon CloudWatch documentation features a user guide, including a using dashboards section, the AWS CLI reference, and the API reference. Support is provided via the Amazon CloudWatch forum.

Amazon CloudWatch dashboards are customizable dashboards that provide a unified view of all your AWS resources – including those that are located in different AWS regions.

Another dashboard displays information on application health and performance from CloudWatch Application Signals, a new tool that Vogels introduced during today’s keynote.

I find AWS employees to be intelligent and well-intentioned, and most of their services quite good. CloudWatch could get there with some work, but it's got a number of very painful usability issues ...

With Real User Monitoring, AWS customers can understand when there is a problem with a deployment and take corrective action before customers really begin to feel it.