Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
It is clear that questions with must-have tag will be very subjective and localized. Why there is a must-have tag?
I'm sure it was created in error. That's a meta-tag for sure.
I removed it from the two questions where it existed. The system will auto-delete it in a few days.