Want this question answered?
He read the engravings on the swords they had found in the troll's hoard. He also saw the moon runes on the map.
It was Elrond Halfelven of Rivendell that not only identified the swords, but also told them what the map said and identified the moon runes.
Elrond was able to tell the company the lineage of each sword and what their purpose was. He was also able to read the runes on the map, even the moon-letters. This gave the company the clue of how they were to get into the mountain.
The coincidence that helps the dwarves during their stay at Rivendell is when the moon comes out while Elrond is looking at the map. It has moon runes on it with extra information. This helps them along the journey to get to the treasure.
It provided additional knowledge about the map and swords. It allowed them to rest and resupply before continuing their journey.
runes are important because they are ancient buildings
Runes were their written language which they used for everything we use it for
Elrond told Gandalf that his sword was of elven make, and was in fact Glamdring "Foe-hammer", the ancient sword of the king of Gondolin. The relevant passage in The Hobbit is as follows: "These are not troll-make. They are old swords, very old swords of the High Elves of the West, my kin. They were made in Gondolin for the Goblin-wars. These must have come from a dragon's hoard or goblin plunder, for dragons and goblins destroyed that city many ages ago....This, Gandalf, was Glamdring, Foehammer that the king of Gondolin once wore. Keep them well!"
they were really buildings if you would like to know.So now can you tell why they were important?
They could be anywhere throughout RuneScape.
Bilbo Baggins knew that his dagger, Sting, was made by the elves by several reasons: 1. It was found with two other swords, which Gandalf and Thorin took, and these had elvish runes on them. 2. Gandalf was wise and learned in this kind of thing and he recognized them. 3. When they brought them to Rivendell, Elrond recognized their make and could read the runes. He told them that they were very old swords of the High Elves of the West, made for Gondolin in the Goblin-wars. Thorin's was Orcrist, or Goblin-cleaver in the ancient tongue of Gondolin, and Gandalf's was Glamdring, or Foe-hammer. Bilbo's dagger was just that, a dagger, but plenty big enough for a hobbit.
Mostly Fire runes but Law runes and Air runes are not far behind them.