If your build produces persistent artifacts such as screenshots, coverage reports, core files, or deployment tarballs, CircleCI can provide a link to download them. You can find them on the 'Artifacts' tab:
The documentation for using artifacts is here: https://circleci.com/docs/2.0/artifacts/
We don't make guarantees about how long an artifact is available. If you're relying on them as a source of documentation / persistent content, we recommend deploying the output to a dedicated output target, such as GitHub Pages or Netlify for static websites.