Taking the work (words, ideas, images) of another and using it without proper credit or acknowledgement in your own work.
Take a look at this video from Loras Library to see examples of what plagiarism looks like.
In a scholarly paper, citation is giving proper credit when quoting, using, or directly referring to the work of another.
If you have questions about formatting citations, feel free to stop by the library to ask a librarian for help.