# Reviewing a Pull Request — GitHub Fundamentals: Collaboration, Pull Requests and Actions

Source: https://www.skillbyai.com/en/github/gh-pr-review

> Review pull requests with line comments, approvals and requested changes, and see how reviews gate merging.

## Line comments & reviews

Reviewers can comment on specific lines, then submit a review as **Comment**, **Approve**, or **Request changes**.

## Requested changes

"Request changes" blocks merging (when required reviews are enabled) until the author pushes fixes and the reviewer re-approves.

**Quiz:** What does submitting a review as "Request changes" do?

- [ ] Immediately merges the PR
- [ ] Deletes the pull request
- [ ] Approves the PR
- [x] Blocks merging until addressed and re-reviewed

*Answer:* Blocks merging until addressed and re-reviewed. It flags the PR as needing changes and blocks merging if required reviews are enforced.