Zapier is a workflow automation software that allows users to create automated workflows called Zaps, which send information from one app to another without coding knowledge required. It offers templates for various use cases, including connecting social media platforms like Instagram and Pinterest. The platform enables users to automate tasks such as cross-posting content between platforms, creating custom pins on Pinterest with customized titles and descriptions, and more. By following a step-by-step guide, users can set up Zaps to automate repetitive tasks, increasing productivity and efficiency. Zapier is available for free and has premium features, including Pinterest, which requires a paid plan.