Almost everybody has a great idea at least once, if not many times in their lives. The idea could be something someone has always wanted to do, or it can be a desire to improve something which already exists. Even rarer is an idea which solves a problem and no product yet exists.
You might be on this website because you too have something in your head which just will not quit. It may have occurred today, last week or years ago.
Protecting and developing this idea is where we come in. Don't let it fizzle out.