Posting images and creating content isn’t always free. There is copyrighted content all over the internet that can prohibit you from using it, Legally that is… One great way of knowing that the images or video or audio that you are using is safe to use is through Creative Commons.
If you don’t already know what Creative Commons is yet, here is a little discription of it.
From Wikipedia: “Creative Commons is an American non-profit organization devoted to expanding the range of creative works available for others to build upon legally and to share. The organization has released several copyright-licenses known as Creative Commons licenses free of charge to the public.”
It’s basically free content for you to use in whatever you want!
Here is an example of an image from Creative Commons.