What is one of the Agile Release Train events?

 A Solution Demo is one of the Agile Release Train events. A Solution Demo is a periodic event where the current state of the Solution is evaluated by the relevant stakeholders, including customers and users. The Solution Demo provides an opportunity to inspect and adapt the Solution, and to validate that it meets the Solution Intent and the customer needs. The Solution Demo is typically held at the end of each Program Increment (PI), and may also be held more frequently depending on the Solution context and feedback mechanisms. References: Solution Demo - Scaled Agile Framework, SAFe® for Teams - Know Your Role on an Agile Team | Scaled Agile, Exam Study Guide: SP (6.0) - SAFe® Practitioner - scaledagile.com