In the course of designing and building a great slide presentation, you may find that you have some slides that make great stand-alone graphics for things like posters, flyers, and social media posts. There is an easy way to download those slides as JPEG and PNG images. That process is demonstrated in my video below.
Applications for Education
If your students are already familiar with the design tools in Google Slides, have them use those tools to create graphics for flyers and collages rather than muddying the water with yet another web tool.