On a bigger site, it's common for many pages to accidentally share the same title or description, often due to a template default that was never customized.
Export a Full List of Titles and Descriptions
Reviewing a complete list, rather than clicking through pages individually, makes duplicates far easier to spot.
Prioritize Fixing High-Traffic Duplicates First
If the list is long, start with the pages that matter most to your current traffic and business goals.
Set a Standard Going Forward
Establishing a simple process for writing unique titles and descriptions on new pages prevents the same problem from recurring.
Next step: Use the SEO Audit to generate a full list of your site's current titles and descriptions to review for duplicates.