What Germans did with the captured weapons and equipment? To what units was it usually issued to? Did they start to produce foreign designed eq?

With the fall of Poland and France, Germany undoubtedly ended up with many captured vehicles and small arms. My question is how important they were in their military efforts? Did they start producing some of the foreign equipment on their own? If so how they introduced this equipment to their soldiers who I assume were fed with the propaganda of “superior German design”. Also, how captured equipment affected the design of their own weapons and gear?