Answer:
yes. It prevented a war between east and west Germany (which would have resulted in a war between the east and west powers) as tensions were growing high in Berlin. there was huge emigration from east to west, causing problems for Ulbricht who was losing all his most skilled citizens (doctors, etc were leaving to the west). East Germany's economy was collapsing and the state was in a desperate condition (also because the USSR was draining it of all its resources). the wall ended these tensions (the west's economy was doing fine under capitalist rule and with a new currency - deutsche mark). It also emphasised the split between the east and the west.