Once you're satisfied with the branch you're working one, you can open a PR.
It is important to provide enough contextual information in the PR description, to make it easier for reviewers.
All PRs are automatically checked on CircleCI.
The github checks make sure that the tests are successful before merging a PR.
Ask & wait for 1 approval.
A guide for reviewing code and having your code reviewed: thoughtbot/guides/code-review.
Tag your PR with ship it when it's ready to be merged.
The kodiak bot will merge your PR.