Yochay Kiriaty gave a presentation on serverless computing using Microsoft Azure services. He began by defining serverless and its benefits like event-driven scaling, sub-second billing, and abstraction of servers. He then demonstrated several serverless patterns using Azure Functions for tasks like processing data from Blob storage, responding to API requests, and replicating logs between data centers. Throughout the presentation, he emphasized best practices for building serverless applications including designing functions to do single tasks, finish quickly, be stateless and idempotent.