If you are looking for a way to add a little more pizazz to your presentation slides or to make them more professional then I have the site for you. Unsplash.com is a site that offers you free HD photos that you can use at your discretion. Simply download the photo(s) you like and use them as backgrounds to your slides, desktop, etc. It’s free and it’s easy!
Check it out! Unsplash.com
Also check out this Youtube video tutorial on how to edit and use Unsplash.com photos in your Google Slides.