There isn't a built-in way to add visual effects to Google Meet, but there are a few workarounds that you can use. One option is to use the screen sharing feature to share a slide deck or video with visual effects. Another option is to use a live video streaming platform like OBS or XSplit, which will allow you to add visual effects to your webcam feed before sharing it on Google Meet. Finally, you can use a green screen and Chroma Key to add visual effects in real-time.