To add music to Google Slides, follow these steps:

1. Prepare your audio file
   Use an audio file in .mp3 or .wav format. You can use your own music or royalty-free tracks from sources like YouTube Audio Library or Free Music Archive

2. Upload the audio file to Google Drive
   • Sign in to your Google Drive.
   • Click New > File upload and select your audio file to upload it

3. Set sharing permissions
   • Right-click the uploaded audio file in Google Drive, select Share.
   • Change access from Restricted to Anyone with the link and set permission to Viewer. Click Done

4. Insert the audio into Google Slides
   • Open your Google Slides presentation.
   • Select the slide where you want the music.
   • Click Insert > Audio from the menu bar.
   • Choose your uploaded audio file from Google Drive and click Insert

5. Adjust audio playback options
   After insertion, a speaker icon appears on the slide. You can click it to play the audio or drag it to reposition. Use the format options sidebar to set playback behavior such as:

   • Play on click or automatically
   • Adjust volume
   • Change icon appearance

Alternative method:
You can also add music by inserting a link to an online audio source (e.g., SoundCloud, Spotify) as a clickable link on a slide. However, this requires an internet connection during the presentation and does not embed the audio directly

. Summary:

• Upload audio file to Google Drive
• Insert audio into slide via Insert > Audio
• Customize playback settings as needed

This is the official and most straightforward way to add music to Google Slides presentations