Why was the Duma created after Bloody Sunday and what did the Duma do for Russian citizens?
The Duma (or parliament) was created in 1905 after Bloody Sunday in order to appease the citizens of Russia. A lot of what they were rebelling against in this revolt was the excessive power of the Tsar. So the imperial government decided to institute a Duma to try to make the people feel as if they were having more control over the government.
However, the Duma was really just created for show. The Tsar had no real intention of giving actual power to the citizens. So it really didn't do much for Russian citizens.
Continuing the above answer, the Duma was created largely as a show reform by the Czar, attempting to give the appearance to the general population and those discontented within the government itself that reform was taking place.
The failure of the Duma as real reform of the Czarist system meant that Russia continued to march towards the Russian Revolution of 1917. It gave ammunition and arguments towards the foundation and growth of the Communist movement in the country that would eventually overthrow the monarchy.