Take an existing Drupal Core issue, and edit it so that it has a standardized, clear, up-to-date issue summary.

Deliverables - Links to the issues whose Issue Summaries you updated.

Resources - https://www.drupal.org/project/issues/search/drupal?project_issue_followers=&issue_tags_op=%3D&issue_tags=Needs+issue+summary+updatehttps://www.drupal.org/contributor-tasks/write-issue-summary