Log in to your Wix editor
Click the plus sign to Add and choose Embed and click Embed a Widget
Inside Speaker Deck, go to the presentation you want to embed. Click on the Share icon on the bottom right of the presentation player
Click on the Embed tab to view the Embed options
Copy your embed code from your Speaker Deck presentation (choose the iframe option)
Back in Wix, click Enter Code
Paste the embed code into the HTML editor
Inside the editor:
Click Update
You will then need to Preview or Publish your website to use the interactive features of the presentations. The presentation will not go forward a slide in Edit mode in Wix.