This is the 54th most frequent Serbian word.
то
"То" in Serbian means "that" or "it."
Here, 'то' is used as a demonstrative pronoun meaning 'that' for presenting an object.
То је књига на столу.
That is a book on the table.
In this sentence, 'то' functions as a pronoun referring to the previously mentioned concept or idea.
Схватио сам то одмах.
I understood that immediately.
'То' in this case acts as a pronoun representing the concept or action explained subsequently in the discourse.