backrefs features

https://page-wiki.win/index.php/A_Practical_Look_at_Backrefs_Pricing_for_Link_Building_Teams

Backrefs features let you reuse previously captured groups in regex patterns, saving time and reducing repetition. For instance, you can match repeated words, validate paired tags, or enforce consistent formatting—all by referencing earlier parts of your match. This adds flexibility without cluttering your expression.