We use the words "also", "too" ,"either" to connect sentences and to add more information.
We use "too" at the end of an affirmative sentence.
We use "also" after the verb "be", "have" (for possessions) and modal verbs (e.g. "can") and before "have" (for actions) and the other verbs.
She is also very generous. = She is very generous too.
He also writes his blog in French. = He writes his blog in French too.
We use "too" in affirmative sentences and "either" in negative sentences.
He writes his blog in French too.
He doesn't write his blog in French either.