Here’s how adding a custom skill on Matter for Slack works:
Step 1: Visit the skills page
Click the “Skills” tab in the navigation bar. This will take you to your skills page on Matter. Use the Skills page view, add, or remove skills.
Step 2: Add a new skill
Click the “Add a skill” button. This will open the ”Add a Skill” creation flow. Click "Create a custom skill" to be taken to the custom skill creation form.
Step 3: Enter the details
Enter your custom skills name, description and optionally select a badge color to differentiate between multiple custom skills (you don’t want a long list of purple skills - orange is nice!).
After you enter the details and click "Create" you'll see your new custom skill listed on your skills page.