It may cause you some problems.
If you need generic sort of photos, you're better off looking at Pixabay or other image sites with a vast array of copyright-free images.
If you're after specific photos, it becomes a bit more tricky. My advice would be to stay away from any images that are from Google Shopping in particular. And for anything else, do an advanced search in Google, which allows you to search for images that are not copyright restricted. If you absolutely must use an image that has copyright attached, make sure you credit the source. And have a good DMCA page on your site, including an email address where you can be contacted. Hosting outside of the US is also advised.