The document describes the building blocks and steps for a serverless service bot using Slack API, AWS Lambda, API Gateway, AWS IoT, and DynamoDB. The bot handles real-time alerts and facilitates a workflow for approving vendor quotes. It uses event-driven architecture to respond to user interactions in Slack within 3 seconds and stores session data in DynamoDB. The 5 steps include: 1) receiving temperature alerts via MQTT and posting to Slack, 2) users responding and buttons to select vendors, 3) engineering recommendation, 4) buyer approval, and 5) manager approval to place an order.