Many people have great ideas but fail to make them known to others. After a while they realise they're not making enough sales and stop their project.
|A well-known idea is more likely to succeed, isn't it?|
Others may have smaller ideas, sometimes not even as good, but manage to make them really famous. Think about tools like gmail. They win in the long run as so many people know what they are, how to get them when they need them. Some people even talk about them to their own friends.
It may sound easy but the more famous you or your idea are, the easier you product will sell. Thus why your priority should be to make your idea km known.