Which data visualization do you find most underrated?

When people talk about data visualization, the conversation usually revolves around bar charts, line charts, dashboards, and KPI scorecards. While these are incredibly useful, there are many visualization techniques that can reveal patterns, relationships, and insights that traditional charts often miss.

For example:
• Network graphs can uncover hidden relationships between entities.
• Sankey diagrams can clearly show flows and transitions.
• Heatmaps can reveal trends and anomalies at a glance.
• Treemaps can simplify hierarchical data.
• Scatter plots can expose correlations that aren’t immediately obvious.

In your experience:

🔹 Which visualization technique deserves more attention?
🔹 What problem does it solve better than traditional charts?
🔹 Can you share a real-world use case where it helped uncover valuable insights?
🔹 Which tools do you use to build these visualizations?

Looking forward to learning from the community’s experiences and discovering some hidden gems in the data visualization world.