AWS Readme.md extended with the missing trusted Advisor description (bregman-arie#208)

Author: bakossandor

exercises/aws/README.md

@@ -2833,6 +2833,11 @@ Read more [here](https://aws.amazon.com/quickstart)
 
 <details>
 <summary>What is the Trusted Advisor?</summary><br><b>
+
+Amazon definition: "AWS Trusted Advisor provides recommendations that help you follow AWS best practices. Trusted Advisor evaluates your account by using checks. These checks identify ways to optimize your AWS infrastructure, improve security and performance, reduce costs, and monitor service quotas."
+
+Learn more [here](https://aws.amazon.com/premiumsupport/technology/trusted-advisor/)
+
 </b></details>
 
 <details>