If you want to link a Jira issue to your checklist item, do the following:

• enter your issue key ( e.g., “KAN-2”) or add its link

• hit ‘Enter’ or press '✓' to save your item

What you will get is a nicely represented issue badge with Summary and Status that automatically links to the referred issue.

Here's how it looks.

You type:

You get:

Render external links in the Smart Checklist

Since version v2.5.37-AC Smart Checklist for Jira Cloud all the external links to valid accessible services (e.g. Confluence, Atlassian, Zoom, Vimeo etc.) will be rendered in a nice way.