This is the 3284th most frequent Polish word.
tata
Father; dad.
Here, 'tata' is used as a noun in a possessive context to denote a father figure.
Mój tata jest bardzo miły.
My dad is very kind.
In this sentence, 'tatą' is used in the instrumental case of the noun to indicate a relationship or action done with the father.
Lubię rozmawiać z tatą o różnych rzeczach.
I like talking to my dad about various things.
Here, 'Tata' is used as the subject of the sentence without any possessive or case modifications.