What are struct tags in Go for and how to use them?

Hello everyone! I recently started learning Go and came across something called struct tags. I see that in code examples they often write something like: ```go type User struct { Name string `json:"name"` Age int `json:"age"` } ``` Or also: ```go type Config struct { Host string `yaml:"host"` Port int `yaml:"port"` } ``` I understand that these are some kind of metadata in backticks, but what exactly are they for? The code works without them too. I tried removing the tags — and the program compiled, but when working with JSON, my fields started being named with a capital letter, not the way I wanted. Please explain for beginners: what are struct tags, why were they invented at all, and in what real situations are they used? I'm especially interested in how to