Do more with AWS WAF labels using dynamic label interpolation

**Executive summary:** This AWS WAF blog post introduces dynamic label interpolation using the `${namespace:}` syntax to resolve label namespaces and synthetic labels (e.g., request ID, client IP, JA3/JA4) at evaluation time. It explains interpolation behavior (single/multiple/no match), supported locations (custom request/response headers and bodies), and practical uses—forwarding Bot Control and other labels to origins, building debug-enabled block/challenge pages, constructing verification redirects with request context, and segmenting CloudFront caches by classification—while emphasizing reduced rule maintenance and examples for adoption.