Google Slides supports MP3 and WAV audio formats.
If you have a local copy of the audio file you want to insert on your computer, upload it to your Drive and then use the Google Drive tab to search and locate it. In this blog post, we’re going to show you how to insert audio and video into Google Slides and give you some examples where using video can enrich your presentations and increase audience engagement. An easy way to bring movement and dynamism to your slides is by adding audio or video.
Although Google Slides is an incredibly simple and intuitive tool for building presentations, its animation limitations mean that slides can lack oomph.