The correct option is Speed up and standardize discussions in reviews and issues by inserting predefined responses.

Saved replies let reviewers insert prewritten comments into pull request reviews and issues which reduces repeated typing and helps conversations move faster. They promote consistency across a team because everyone can reuse the same approved wording and formatting. They can include markdown and links so they are well suited for common guidance and checklists that a support team frequently shares.

Keep sensitive notes and credentials that teammates can reuse across repositories is incorrect because saved replies are not a secure store for secrets and anything inserted becomes visible in the conversation which would risk exposure.

Track edits and merges happening on multiple branches in a repository is incorrect because saved replies do not provide repository analytics or branch tracking as they only help with writing comments more quickly.

Automatically draft new responses to common questions without any reviewer input is incorrect because saved replies must be chosen and inserted by a person and they do not generate content on their own.

Full AWS Practitioner Certification Question