Those look like galls made by a tiny fly called a grape tumid gallmaker. They are rarely a serious enough problem to affect the grape yield. You can prune off affected leaves and shoots. Destroy the prunings by burning or by sending them to the landfill. Otherwise the larvae inside will hatch out and continue to infest your grapevine. You can read more on this web site from MSU Extension: https://www.canr.msu.edu/ipm/diseases/gallmakers_on_leaves