1. In your Google Slides workspace, open any presentation file.
2. Go to the top toolbar and click Extensions.
3. Hover over Add-ons, then click Get add-ons.
4. In the marketplace, search for the extension you want (e.g., ChatGPT).
5. Click Install on the add-on you want to add.
6. Click Install again to confirm.
7. Click Continue to proceed.
8. Select the permissions you want to grant.
9. Once done, click Continue.
10. Click Done, and you’re all set!