Use this add-on to choose from thousands of striking, beautiful images and insert them in your Google Docs document, all without worrying about copyright 

Pixabay images are released under Creative Commons CC0 into the public domain. You can use and modify these images even for commercial purposes, all without asking for permission or giving credits to the artist. However, contents may still be protected, e.g. by trademarks or privacy rights.

Note: Icons made by SimpleIcon from www.flaticon.com and is licensed by Creative Commons BY 3.0