Short answers, pulled from the story.
The Amber Road was an ancient trade route that carried amber from the coastal areas of the North Sea and the Baltic Sea to the Mediterranean Sea. The main Roman-era route ran south from the Baltic coast in modern Lithuania through the full length of modern Poland, through the Czech Republic and Slovakia, and on to Aquileia at the head of the Adriatic Sea.
Baltic amber was moved from Northern Europe to the Mediterranean from at least the 16th century BC. The breast ornament of the Egyptian Pharaoh Tutankhamun, who ruled around 1333-1324 BC, contains large Baltic amber beads, demonstrating how far the trade reached by the second millennium BC.
Amber was sometimes called the gold of the north. It was transported over thousands of years as a luxury material used in ornaments, sacred offerings, and royal burials. The Royal Hypogeum of Qatna in Syria held a quantity of amber unmatched by any other known second millennium BC site in the Levant and the Ancient Near East.
Amber was actually the smallest share of goods transported along the route. Animal fur and skin, honey, and wax were exported southward to the Romans, while Roman glass, brass, gold, tin, and copper moved northward into the Baltic region.
The largest archaeological amber find in the world was discovered at Partynice near Wroclaw, Poland, dating from the 1st century BC. It is estimated to weigh between 1,240 and 1,760 kilograms and is currently held in the Archaeological Museum in Wroclaw.
The Amber Road has left several modern legacies. In Poland, the north-south motorway A1 is officially named the Amber Highway. The EV9 Amber Route is a long-distance cycling route between Gdansk, Poland, and Pula, Croatia. The modern Baltic-Adriatic Corridor also follows routes that roughly trace the ancient road.