A Mercury lander mission would create opportunities to sample unique geological features. However, extreme temperature fluctuations on Mercury’s surface pose challenges for exploration on the planetary surface. In a narrow region near the terminator, temperate conditions would allow a rover to run on solar power and collect data and surface samples without needing to withstand the extreme heat.
I think it’s written badly on purpose to get people to click to find out what it actually means. An interesting article though so I’ll forgive it.
That’s almost always a fair assumption these days.