The article explores the functionality of n8n, focusing on how to handle services without Trigger nodes by implementing a polling workflow. Trigger nodes in n8n initiate workflows when specific events occur, but not all services, like Google Sheets and Twitter, have them. Polling serves as an alternative, periodically checking for new data and executing workflows if changes are detected. The process involves using nodes such as Interval, Function, and Mattermost to periodically fetch, compare, and communicate data updates. By detailing a specific example with Google Sheets, the article demonstrates setting up a workflow that checks for new data every 45 minutes and sends a notification via Mattermost if updates occur. This approach is applicable to various use cases, providing a solution for automating tasks across platforms that do not inherently support webhooks. The text concludes by encouraging experimentation with polling workflows and offers resources for getting started with n8n.