Video game developers, programmers and artists are gathering in San Francisco this week for the first in-person Game Developers Conference since 2019. One topic getting a lot of attention is non-fungible tokens — digital certificates showing ownership of digital assets like a picture or video. It’s a topic for Quality Assurance, where we take a closer look at a big tech story. Marketplace’s Kimberly Adams speaks with Stephen Totilo, who covers gaming for Axios and is attending the conference.