IFTTT, short for 'If This Then That', is a web-based platform that connects various applications, devices, and services from different developers to automate tasks via conditional statements, called applets. These automations allow users to create custom logic flows between services and devices, such as linking smart home devices or integrating online services for streamlined operations. Features of a subscription may include an unlimited number of applet creations, access to premium applets, and more advanced customization options.