When we approach a specific topic, different ideas and knowledge related to that topic come to mind. But so many ideas and knowledge can be stirred and it can be difficult to conceptualize the subject clearly. This is where the conceptual map comes in.
A conceptual map can have several representations. It can be a graphic technique, a means to visualize ideas, a learning tool and a means to organize in a hierarchical way the contents that are already known and the new ones, that are unknown.
Even so, the best known definition for a concept map is: a visual representation that organizes your thoughts and makes connections between different ideas. It helps you understand and remember concepts, since the human brain processes visualizations faster than pure text. They can be done with a pen and paper, or you can use free software for your computer that can only be used for online concept mapping.