Short answers, pulled from the story.
The East Pomeranian offensive began on the 10th of February 1945 and ended on the 4th of April 1945. The operation involved Soviet Red Army forces fighting against the German Wehrmacht in Pomerania and West Prussia.
Marshal Konstantin Rokossovsky commanded the 2nd Belorussian Front during this campaign. His forces were initially ordered to advance westward north of the Vistula River toward Danzig to protect Zhukov's right flank.
The primary goal was protecting the right flank of Zhukov's 1st Belorussian Front while pushing directly toward Berlin. The Soviets aimed to eliminate any possibility of a German counter-offensive from that region before advancing further east.
According to Soviet claims, Germans lost 39,000 soldiers dead and 10,000 captured during the Battle of Danzig. This battle concluded when Danzig finally fell on the 30th of March 1945 after which remnants of the 2nd Army withdrew southeast of the city.
Stalin delayed the push toward Berlin to secure flanks by eliminating large German formations in Pomerania that threatened Zhukov's advancing formations. This decision allowed Soviets to occupy significant parts of Austria during the Vienna offensive but remained controversial among generals and historians.