There were two main impacts of the Great Depression in Germany. There was a huge increase in unemployment and, partly because of that, there was a turn to extremism in politics and society.
The Great Depression hit Germany very hard because it exported a lot of its goods and because it relied on loans from the United States. Both the export markets and the loans dried up during the Depression and the unemployment rate in Germany went as high as 33%.
This economic impact turned into a political and social impact. People were upset about the economy and turned to extremist groups like the Nazis. They hoped the outsiders would have some sort of answer to the country's problems since the insiders clearly did not.