Explanation/Reference:
https://www.scaledagileframework.com/agile-release-train/ (Search for team and then search for collab)

A constructive IP Iteration is one of the recommended practices for Scrum Masters/Team Coaches to help teams avoid burnout, address technical debt, and foster innovation. An IP Iteration is a unique, dedicated iteration that occurs every PI and provides an estimating buffer for meeting PI Objectives and dedicated time for innovation, continuing education, PI Planning, and Inspect and Adapt events. During the IP Iteration, teams can work on activities such as hackathons, research and design, spikes, refactoring, automation, training, and other improvement initiatives that are difficult to fit into a continuous, incremental value delivery pattern. An IP Iteration also allows teams to prepare for and participate in the PI Planning and Inspect and Adapt events, which are essential for alignment, collaboration, and learning across the ART. A constructive IP Iteration can improve the predictability and flow of value delivery, increase employee engagement and satisfaction, enhance the agility and resilience of the teams, and create a competitive advantage for the enterprise. (Must be taken from SAFe 6 Scrum Master resources) Reference:
Innovation and Planning Iteration - Scaled Agile Framework
The CALMR Approach to DevOps [Complete Guide] - KnowledgeHut
SAFe Scrum Master Course Outline

One benefit of PI Planning is that it allows for faster decision-making by bringing together all the members of the Agile Release Train (ART) and the relevant stakeholders in a face-to-face (or virtual) event. PI Planning provides an opportunity for the ART to align on a common vision and mission, review the business context and priorities, identify and resolve dependencies and risks, and commit to a realistic and achievable plan for the next Program Increment (PI). By having everyone involved in the planning process, the ART can leverage the collective knowledge and expertise of the participants, reduce ambiguity and uncertainty, and make informed and timely decisions that support the delivery of value to the customers. (Must be taken from SAFe 6 Scrum Master resources) Reference:
PI Planning - Scaled Agile Framework
Planning Interval (PI) - Scaled Agile Framework
Preparing for PI Planning | Checklist for Scrum Masters and Product ...
Scrum Master - Scaled Agile Framework
Scrum Master role in PI Planning - ValueGlide