Please explain health visitors?

HI,

Okay, so when I first heard the phrase "health visitor", I thought wow, that's really cool -- they send a nurse around to your house after you have a baby, reassure you your baby is fine, ask how you're doing, maybe make you a cup of tea and a scone (okay, maybe not the last part). But the more I hear the more it sounds like a nosy neighbor telling you what it was like when she had her kids back in 1979. And then it sounds like they don't even come to you? How is that a "visitor"?So clearly I'm totally confused. Can someone explain what a health visitor is and what they're supposed to do?

please help

I did not find the right solution from the internet.

Thanks