The three best-known reforms that were instituted by the Progressives to strengthen democracy in the states were the initative, recall, and referendum. These reforms were not instituted in all states, but they were created during the Progressive Era in an attempt to increase the amount of democracy that existed in the states.
An initiative is a law that is proposed by a private (not part of the government) individual or group. The people vote on it and it becomes law if they approve.
A referendum is a law that is proposed by the legislature and put to the people for a vote.
A recall is when a special election is held to remove an official from office before their term is supposed to end.
All of these reforms were meant to give the people more control over the governments of the various states.