Neptune is the second of the generational planets, spending fourteen years in each sign. Everyone born within that period will have Neptune in the same sign. By itself, this placement is not the most important factor in your chart; however, it symbolizes what was going on in the world at the time you were born, and this has left an imprint on you.
You and members of your generation are each imbued with this particular energy, and in some ways it characterizes everyone born during this time. Each individual will express it in their own way, some more strongly than others. The Neptune-in-Capricorn generation has an important job of refining and purifying areas such as government, big business, and the environment. There is also a strong urge to make their dreams come true. There are likely to be some very notable artists emerging out of this group, who are able to manifest their inspiration.