In your own words, what is a peer-reviewed, academic (quality) reference

In  your own words, what is a peer-reviewed, academic (quality) reference,  why is this necessary and how is it different that other references?  

• You  should all be familiar with the academic integrity policy.  If you are  not familiar with this, please read the policy in the Course Info  section.  How can you avoid plagiarism in your writing, especially for  your marketing assignments?  This should be a 300 – 500-word discussion