This is the 97th most frequent Bulgarian word.
то
"It" or "that" (neutral pronoun).
Here, 'то' emphasizes a specific concept or thing that was mentioned.
Знам за това - то е чудесно.
I know about this - it is wonderful.
In this instance, 'то' functions as a neuter pronoun referring to a specific animal.
То е първото животно, което видях днес.
It is the first animal I saw today.
In this case, 'то' represents a general situation or action.