Are you tired of the default themes in Google Slides? Then check out the free templates from SlidesCarnival!
To use one of the templates, scroll to the bottom of the template page. There are two buttons, one to download the Powerpoint template, the other to use as a Google Slides template. Click on the USE AS A GOOGLE SLIDES THEME:
You will be prompted to make a copy of the document.
Click Make a copy. The template will open in Google Slides. You can scroll through the document to see what the template can do. To use the template in your own Google Slides presentation, you will need to create a new Slides document in Google Drive. Then click on the Theme button in the tool bar.
From the Themes selector on the right side, click Import theme at the bottom.
Find the presentation you downloaded and click Select. Click on the theme and then click Import.
You now have the new theme in your document!