The AWS Refresher: Lambda, Kinesis, Step Functions & more` is a recap of various tutorials and guides from the MongoDB Blog, covering topics such as high-volume data streaming with Kinesis, building Alexa skills in the Amazon Developer Console, using Lambda functions to build a Facebook Chatbot, creating Service API Workflows with AWS Step Functions, and optimizing Lambda performance. The MongoDB team highlights these resources in preparation for the upcoming AWS Summit, where they will be present to answer questions and discuss AWS-related topics with the community.