Developer Relations: what it is, and how to measure it

I've been interviewing a lot of DevRels recently (I'm still hiring !) and part of the interview process is, naturally, telling them what the job actually entails. In DevRel that's a bit more important than other positions, because DevRel is such a flexible and multi-faceted role that it means very different things depending what company you're at. So on the principle that "if you talk about…