If you add a source link, you will be eligible for better curation. This is why you have received these messages. It's to help you. Let me show you how easy this is. I'll give you a crash course.

Here's how you would properly source an image from Pixabay.
In the editor, place text such as "source" in the brackets, add your link in the second set of brackets.

Just place that handy little link snugly under the image you upload, and it will look something like this:

Source

If you take this extra step, you will be eligible for better curation. Best wishes.