Erik Deckers said
1 year, 1 month ago: @trudy Simply put, Creative Commons is “permission in advance” for certain pieces of content like photos, videos, or audio files. It allows you to use that content in your own publications, like say, a photo to go along with a blog post.
All you have to do to use it is provide attribution to the original creator, and maybe even link back to them. There are other rules and expectations of Creative Commons, but they vary from piece to piece. Check out http://www.creativecommons.org to find out more about those rules.
The short of it is, you cannot just use anyone’s photo, unless you either have their permission — which you have to ask for, wait for, and possibly pay for — or you get that permission in advance — which is what Creative Commons does. So, rather than just grabbing a photo you found on Google Image Search, you can do an advanced search and only search for Creative Commons images.