Required fields must be complete before an idea can move to the hopper stage or before a project can move to the active stage. If you add required fields to the ideas stage, users cannot submit their ideas for review until all of the required fields are complete. If you add required fields to the hopper stage, then steering committee members cannot start projects until all of the required fields are complete.
To ensure that users complete the required fields, add the fields to your company's official idea form.
For an example, go to Make a data field required.