What is the role of the PMO in organizations? (quote and support your answer from credible sources)

PMO: Supportive, Directive and Controlling

What is the role of the PMO specifically in training and developing project managers skills per the article?

Training, Templates, Directive, Resource Management, Reporting

The article lists three benefits to training project managers (Financial, Morale, organization competitiveness), add two more benefits and explain why you deem them important.

Schedule management, resource management, quality management, risk management

Align the role of the project manager per the article to the PMI talent triangle

Technical project management, leadership, strategic and business management