What does ta in Irish mean?

Answer 1

Tá is used like the English verb 'to be'

For example in the sentence:

Tá mé go maith = I am doing well.

You can also use it as so:

tá sé mór - 'he/it's big

tá mé anseo - 'I'm here'

tá tú óg - 'you're young'

Basically it is a verb, not an affirmative.

Answer 2

Tá is used for yes and in positive sentences. "Tá mé" means "I am" for example.