Can I use Google images for non-commercial use?

Could you please clarify the legal implications of using Google Images for non-commercial purposes? I'm specifically interested in understanding if there are any copyright restrictions or permissions I need to seek when utilizing these images for personal or educational projects. I'm aware that many images on Google Images are copyrighted, but I'm hoping to find a way to safely and ethically utilize them for non-profit endeavors. Your insight into this matter would be greatly appreciated.