What is the essence of dual power in the period of the bourgeois revolution?

The bottom line is that from March 1917 to July of the same year, there were two government bodies in the country. The first such body was the Provisional Government. It ruled the state from the time of the February Revolution, which is considered bourgeois, until the seizure of power in November 1917 by representatives of the RSDLP (b). The second body was the Petrograd Soviet, which in July 1917 recognized the right to unlimited powers for the then formed 2nd coalition composition of the Provisional Government, which included socialists.