Here's an step-by-step walkthrough on how to blur the video background in Google Meet
1. In the meeting page, click the "three-dot" icon option.

2. Select "Backgrounds and effects" from the dropdown menu.

3. Choose this option if you wish to mildly blur your background.

4. Select "blur your background" option, if you want to increase the blur effect to your background.

Awesome, you've successfully blurred the background in Google Meet!