Biblical Aramaic is the Aramaic of Daniel. The bible is written in Hebrew, Greek and Aramaic. This Aramaic is different from that which would have been used in the time of Christ or that used in the later acedemies in Babylon.
Biblical Aramaic is thus important to be able to read the relevant portions (not more than a few blocks of text) in the bible. It would be a beginners mistake to attempt to go to the Hebrew word for these passages in scripture and would lead to the wrong interpretations.
Biblical Aramaic with its similarity to ‘reicharamaische’ or imperial court Aramaic helps to understand the educated speech of Nebuchadnezzar and of diplomatic dialogue in ancient times.