The advisor is a series of 30 automated scanning programs that inspect your AWS environment and finds opportunities to save money, improve system performance and reliability, or help close security gaps. It has routines in four basic areas: cost optimization, security, fault tolerance, and performance improvement. There is a free tier that will examine 4 of the more basic AWS services, and then you can expand its reach for $49 if you are part of the AWS developer network.
If you want more things to run thru the advisor, you will have to pony up a support plan. When you get to an enterprise support plan, you are talking real money -- $15,000, or 10% of your monthly AWS bill, whichever is more. Of course, this includes more than trusted advisor services such as the AWS concierge, where you can get access to an actual live human. AWS claims this is a “senior customer service agent” who is assigned to you. There is a lot more information on this page: