Telegraf, an open-source agent part of the TICK Stack, is highly versatile for collecting and outputting metrics due to its plugin-driven architecture, boasting over 200 community-developed plugins. As companies increasingly adopt serverless architectures, the article explains how to run Telegraf on AWS Lambda, leveraging Amazon's support for custom runtimes, to collect metrics from various SaaS applications without the need for dedicated infrastructure. The process involves creating a Telegraf Lambda layer, configuring a custom runtime function, and setting the Telegraf configuration to monitor memory usage and send metrics to platforms like Logz.io. This setup allows for efficient serverless metric collection and visualization, with the potential to expand capabilities into solutions like Synthetic Monitoring.