Google Slides also has a feature where you can make your image transparent by adjusting the opacity of the image to the percentage you want the image to be transparent.

You can change the background on your Google Slides presentation to a photo or color in a few simple steps.

You can make a picture transparent in your PowerPoint slides so that you can add text over it or use it as a background.

Google has introduced Gemini into Slides, and it will give you the ability to remove the background from images.