Mr Musk, who made the shock bid less than two weeks ago, said Twitter had "tremendous potential" that he would unlock.
He also called for a series of changes from relaxing its content restrictions to eradicating fake accounts.
The firm initially rebuffed Mr Musk's bid, but it will now ask shareholders to vote to approve the deal.
Mr Musk is the world's richest person, according to Forbes magazine, with an estimated net worth of $273.6bn mostly due to his shareholding in electric vehicle maker Tesla which he runs. He also leads the aerospace firm SpaceX.