The compiled stylesheet is the final artifact that the browser evaluates. Reviewing generated CSS is essential when nesting, mixins, loops, interpolation, or selector extension makes the source difficult to translate mentally.

Inspect the output when debugging unexpected selector specificity, duplicated declarations, missing rules, or unexpected media-query placement. Browser developer tools can help map compiled declarations back to source when source maps are available.

Readable expanded output is useful during development. Compressed output can reduce file size for production, although compression does not eliminate unnecessary selectors or repeated declarations.

Treat generated CSS as part of code review. A small change to a mixin can affect many selectors across the application.