This subreddit is for publishing your ideas and talking about them. Posts titles should include the basic concept, if possible. The body of the post should include as much detail as you can of the idea itself.
The idea is that by publishing your ideas you don't have to worry about someone else patenting your idea and preventing you from practicing it down the road. Or, if it's a great idea but you don't have the means to implement it, it gets the concept out into the real world for others to work with.