It's great that you're helping us and your fellow students. Look at you! You're a good person. But what's in this for you?
You know how every job or internship now asks for excellent written and oral communication? Working on the journal is one way to show that you're the excellent-ist at written and oral communication. It'll also make you stand out to potential grad schools as someone interested and engaged in research and scholarship. Finally, it just makes you look well-rounded. Sure you majored in engineering, or nursing, or English, or visual art, or business, but you could understand and communicate with people from a number of different disciplines.
Below are some examples of how to talk about your URJ work on a CV or resume.
Review more than 3 papers during your career as a peer reviewer and we upgrade your title to Senior Reviewer. You'll have the title of Senior Reviewer listed by your name in the URJ, and it's something easy and impressive to add to your resume and school applications, or simply to throw in the face of your less impressive friends, siblings, and relatives.
Employer asks for... excellent oral and written communication skills
You say...
Employer asks for... critical thinking
You say...
Employer asks for... ability to work with/communicate with variety of people
You say...
Employer asks for... initiative/independent worker/passion for learning and growing
You say...