What was the “Silk Road” mainly used for in medieval times?

The story behind the answer

It was a vast network of overland and sea routes linking China, Central Asia, the Middle East, and the Mediterranean, whose primary purpose was commercial exchange. Caravans hauled silk, spices, porcelain, paper, and precious metals, stopping at fortified caravanserais and dealing through middlemen such as Sogdian merchants. States profited by taxing traffic and protecting key passes and oases.

Beyond goods, the routes carried ideas and technologies—paper-making, gunpowder, navigational tools—as well as religions like Buddhism and Islam. Under the Mongol Empire’s Pax Mongolica (13th–14th centuries), safer travel spurred booming exchanges. The same connectivity also spread disease, including the plague that reached Europe in the 14th century. Hubs like Samarkand and Kashgar, and Indian Ocean sea lanes, formed crucial links in this transcontinental system.