This is the 3579th most frequent German word.
mia
"Mia" is not a standard German word but can be a name or a colloquial variation of "mir" (to me).
Here, 'Mia' is used as a proper noun, referring to a person's name.
Mia geht heute ins Kino.
Mia is going to the cinema today.
In this example, 'mia' is dialectic or colloquial variation of the German word 'mir', meaning 'to me'.
Das gefällt mia gar nicht.
I do not like that at all.
Similarly here, 'mia' is used as a colloquial form of 'mir', meaning 'to me', commonly found in certain German dialects.