What is the primary disadvantage of 'chartjunk' in data presentation?

The primary disadvantage of 'chartjunk' in data presentation is that it can obscure the data's message. Chartjunk refers to unnecessary or distracting elements in a data visualization that do not contribute to the comprehension of the information being presented. Instead of clarifying the data, these embellishments can confuse the viewer, making it more challenging to understand the key insights. When the focus shifts to these distracting elements, the essential information may become lost or misinterpreted, hindering effective communication. Thus, a clear and focused presentation is vital for effectively conveying data-driven insights.