Creating summaries as part of viva prep helps you to gather useful thoughts. A summary is a chance to focus and gives you space to think in advance of the viva.
Write an overview of your thesis and you bring together a lot of helpful information.
Make a list of what you’re most proud of and you highlight ideas to share with your examiners.
Prepare a summary of your research methodology and you bring together valuable points.
Do any or all of these, or create any kind of summary, and you’re not creating a script to read from in your viva. You’re doing some of your thinking in advance though: you’re helping yourself to pre-consider topics you might need to engage with when you meet your examiners.
