How do I add audio to my PowerPoint presentation?

Define the purpose of your audio – Consider what you'd like to accomplish with audio in your presentation.
Integrate audio creatively – Don't make audio the primary feature, but find a way to use it to supplement the content you're presenting.
Choose your audio files wisely – Make sure to pick audio clips with good quality sound.
Be mindful of copyright laws – Make sure that all audio clips you use are either ones you have the rights to use or are in the public domain.
Add the audio clips to the slide – Click the Insert tab on the ribbon menu and select the Audio option. Then find the file or clip you'd like to use and click Insert.
Set the audio clip to play automatically – You can adjust the timing of the audio to ensure that it's in sync with the rest of the presentation.
Test the audio clip – Once you add the audio clip to the slide, go through and verify that it plays correctly.