The blog post guides readers through setting up an AWS IoT Button as a trigger for an AWS Lambda function, which stores JSON documents in Couchbase using the Couchbase Java SDK. The process involves configuring the IoT button using the mobile app, creating an event source mapping for the Lambda function, and testing the button by clicking it to invoke the Lambda function and store a document in Couchbase. The post also discusses how multiple AWS IoT buttons can be used as triggers for different Lambda functions. Additionally, the blog touches on the possibility of registering IoT buttons without having an AWS login, allowing customers to use them without requiring additional setup or access.