Identify a few key success measures aligned to your brand goals and objectives to guide your strategy for content migration. These could include conversion metrics such as CTA clicks or leads generated, engagement metrics like time spent and bounce rate, or even basic traffic metrics — it all depends on how you measure success and what you want your newly migrated content repository to accomplish for your brand.
From there, pull these metrics for all pieces of content and start sorting! If you know that your content needs to be optimized for multiple goals, consider creating a composite score of multiple metrics to sort success across multiple areas. Additionally, consider some of the questions you’d ask in a traditional content audit to uncover areas you may not have considered. For instance, what creative types perform best? While migrating, should you consider refreshing titles, images, or CTAs to be more effective? You will likely still need to look at some pieces in detail to help determine a final migration list, but an audit-like approach will help you triage and prioritize — especially if you have an overwhelming amount of content to consider.