It tells you that the candidate at least understood the business impact of what they were doing, and it gives you something to talk about in the interview. "How was that issue identified? Did you find it or were you assigned the task?" "How did you achieve those results? What technical decisions did you make to get there?". "Were you the team lead or did you work under another team lead?".
So many good questions to spawn from that one line.
Those lines of questioning are open always, regardless of what’s written in the resume. You have precious few inches in the resume, they should be reserved to highlight your own accomplishments, the aspects of any project that you actually drove. When I see these kind of metrics on every other bullet (for L5 and below) it tells me a lot about the candidate and not that they have an appreciation for the business impact of their technical skills.
So many good questions to spawn from that one line.