什么时候使用 Bar Chart
You are comparing values across categories
Revenue by country, headcount by department, votes by party. One bar per category, one number per bar, no ambiguity.
You want a ranking
Sorted bars turn a table into an ordered picture. The reader sees first, last and the gaps between them without reading a single number.
The differences are small and still matter
Because bars share a baseline, a few percent difference is visible and trustworthy. Pies and donuts cannot do this.
Your category names are long
Horizontal bars give long labels a full line each, with no rotating or truncating. This alone makes bars better than columns for most real-world category names.