Proposals for new features on the Stack Exchange network, or requests for a change to an existing feature.
You have an idea for a new feature to be added, or for a change in existing functionality. Great!
Be sure you have thoroughly searched that the feature you are thinking of has not already been proposed. If it has, and it hasn't received a response, follow the advice at How do I get attention for old, unfixed bug reports and feature requests without official responses here on Meta?. If it has already been declined, and you believe that there are new reasons why the team should change their mind, be sure to clearly address the reasons for originally declining it as well as the new reasons for implementing it.
If no proposal exists, then make sure your proposal is in the form of a question focused on the problem or functional purpose that is driving your perceived need or desire for the new feature, and not focused on what you believe may be the solution for the new feature itself (your solution is better made as an answer to your question). So give as much detail and context as possible on the background situation that caused you to bring a feature request and make sure it is formulated to justify why the new feature is needed and/or how it can improve the community. Basically, prove to the administration that they should spend time developing your feature.
Note that voting on feature requests is based on whether people agree or disagree with your proposal, so if your request gets downvoted, it doesn't necessarily mean that your question is of bad quality; it may just mean that people disagree with your feature suggestion.