In Germany what was the purpose of killing centers?

In Germany, killing centers were established during the Holocaust as part of the Nazi regime's systematic extermination of Jews and other groups deemed "undesirable," such as Romani people, disabled individuals, and political dissidents. These centers, like Auschwitz and Treblinka, were designed for the mass murder of victims through methods such as gas chambers, often under the guise of resettlement or medical treatment. The overarching purpose was to implement the Nazis' ideology of racial purity and eliminate those they considered threats to the Aryan race.