Web Link Slide App allows you to share a URL to your students, which can be website addresses or even any Google Docs/Google Slides/Audio clips and Videos from Google Drive with the shareable link.
Clicking on the 'Embed within Deck.Toys window' button allows the web link to appear on the student's device as a floating frame and they can use this to complement their Slide Activities.
For example, if you would like to add a background music from your Google Drive to your Slide Activity, find the shareable link of your audio file.
Then add the "Web Link" Slide App and paste this audio file link. Students can manipulate the audio on/off button for the background music.