VDA 5050 is an open protocol devised by the German association of car manufacturers (Verband der Automobilindustrie), it is meant to become the common language that AGVs (autonomous guided vehicles) use to exchange information with a controller. To get an idea of what it looks like - imagine a fleet of robots moving pieces and materials from one spot to another on a factory floor. A controlling server sends instructions, telling each robot where to go, which checkpoints to drive through, what actions to perform and with what settings (e.g. "pick up this specific box and bring it over there, place it on the second shelf").
VDA 5050 uses MQTT to transmit JSON payloads to several purpose-specific topics. In the screenshot you can see several windows, each displaying the data arriving to these topics.