Smart Links are a new content object within Answers in addition to pages, whiteboards, and databases. Smart Links are connections to third-party products that are displayed in Answers and interacted with as if it were an Answers page. It would appear similar to a page in the content tree on the sidebar, however when navigating to the Smart Link, would fetch the content that the Smart Link was setup with. There are over 1,000 integrations available, including individual Orange Tracker issues, Google Drive, Figma, and much more.
For additional information on using Smart Links, see the following vendor documentation: https://support.atlassian.com/confluence-cloud/docs/insert-links-and-anchors/