If you’re 2nd author, sure you can list it. But in real life, a lot depends on your role. Some kids do little, but have a generous mentor who includes them. Just being listed isn’t the “it.” It’s even becoming common for some fields. Just saying you’re part of this isn’t very descriptive of you, as an applicant.
So, it’s not a special tip. Having found the opp and committed to it is more. In some cases, a ‘check mark’ that you pursued this. Make sure your Addl Info doesn’t run on. A short para can do. You don’t need intricate details.
Be careful not to overuse Addl Info. Adcoms just want the gist of something that doesn’t fit in otherwise. Not a full resume. Editing carefully is nice, after making the decision what belongs there.