Build Slack Webhook to send push notifications into channels. Team Instant Messaging. Send messages Messages are the building blocks of apps and bots. Start from “Hello, world,” or connect a service you already use. Give users a shortcut Help users discover what your app can do with Shortcuts. Automate with workflows Harness the power of apps, without the code. Create simple interactions Your app can respond to user activity, and buttons let users complete simple tasks (like requests and approvals).