I hate it when an author mentions a fact that is completely irrelevant to the plot like no I don't want to know how the soup tastes I want to know how the Main Character is going to sneak out of the kitchen not how the soup tastes, this is not to be confused with cool fun facts. Also throwing around terms and phrases and plot points and not giving an explanation, like, Oh ya this character can shape shift now, moving on, NO, If this character can shape shift, then why didn't they use it to escape the prison cell two chapters ago!
Well, writers do this to connect the read to the world, making the reader feel like they’re apart of the world… having details like that just adds to the scenery, making it more realistic in some situations…