When someone says "it's an idea," they are typically referring to a concept, suggestion, or proposal that has been put forward or discussed. The phrase implies that the thing being discussed is not yet fully formed or finalized but is being considered or explored as a potential course of action, solution, or creative thought.
In this context, "it's an idea" suggests that the topic under consideration may not be fully developed or implemented yet. It could be an initial thought, plan, or recommendation that needs further examination, refinement, or discussion before it becomes a concrete reality or decision.
Using this phrase can also indicate that the person is open to feedback, input, or collaboration from others to shape and improve the concept. It is often a way to communicate that the idea is not set in stone and is subject to evolution and adaptation based on additional information or insights.
Overall, saying "it's an idea" implies that the concept is still in the early stages of consideration and that more work needs to be done before it can be fully realized or acted upon.