As soon as you start entering a new idea, a list of similar ideas might show up, allowing you to either vote for an existing idea or create a new one.
There is no restriction on votes but you can vote any idea only once. hence vote for ideas that you want to see in future releases of Visio
When you create a new idea you will be able to pick a category. You can then filter by categories on the right sidebar. If you feel we need to add some categories please let us know.
You can add #hashtags to your idea description for tagging! it makes it easier to search for similar ideas.