The interviewer clarified: they meant a specific task, a small one, that you personally solved. Can you give an example?

One example is an automation task for collecting user requirements for a small project.

Previously, requirements were gathered manually via email and oral discussions, which led to information loss and delays. I developed a simple form on an internal portal where users could submit their wishes and comments.

This allowed structuring the requirements, speeding up their processing, and improving communication quality between the team and clients. The task was implemented independently and took about a week.