Zapier is a web-based automation tool that allows users to create automated workflows between different web applications. With Zapier, you can connect various apps and automate tasks, without any coding skills. Zapier Integrations work by creating "Zaps," which are automated workflows that connect two or more apps to complete a task. For example, you can create a Zap that automatically saves new Gmail attachments to Google Drive or sends a Slack notification for new Trello cards. Zapier supports over 2,000 apps, making it a versatile tool for automating tasks across different platforms.