Long ships were very important to the Vikings because they used them to raid other countries the would steal gold silver and anything valuable. If they didn’t invade then the Vikings wouldn’t have anything to sell.
they would also long ships for catching fish to eat they used to come out to shore and they would go fishing and because the long ships was 18 meters long!! They could fit quite a lot of fish.
Long ships were also important because Vikings would sail out to different countries and carry gold silver and other special things.