If a photo has a the name of the company/creator written on the image or if it has the ⓒ symbol, then it’s generally safe to assume this image is protected under copyright and you can’t use it.
One good way to see if a photo is copyrighted is by reverse searching for the image. Right click on the image and select “copy image address”. Then paste this into Google Images or a site dedicated to reverse image search, like TinEye. This will show you where the image is used, and where it has come from.
