Slack is by far one of the most popular integrations we see when we’re building real end-to-end workflows in n8n—daily notifications, onboarding sequences, and especially human-in-the-loop reviews where an AI agent outputs something and a person approves it before the workflow continues. In this video, I walk through the full setup so you don’t get stuck in Slack’s (honestly daunting) docs the first time. I show where to find the Slack node (44 actions) and the Slack trigger (8 triggers), and which ones you’ll actually use in real builds—mostly message actions, plus a few file and channel operations when you’re doing onboarding or ops automation. I break down the two credential approaches: API access token vs OAuth, and the annoying-but-important catch—OAuth is recommended for the Slack node but doesn’t work with the trigger node. Practically, I usually set up the API token so triggers work, and if you want, you can keep two credentials. Then I demo sending a message to a channel, setting up event subscriptions + the n8n webhook URL for triggers, and subscribing to a “new message posted to a channel” bot event. Finally, I show a real customer workflow that uploads a daily CSV report into Slack (and emails it too), plus a clean human approval pattern using “send and wait for a response.”