How to choose the right chart
The hardest part of making a chart isn't the software. It's deciding what to show. A good chart makes one point, clearly, to one audience. Most confusing charts come from someone visualizing the data they happened to have instead of the point they wanted to make.
A chart is an argument, not a data dump. Decide what you want people to take away, then pick the chart that makes that obvious.
Start with the question, not the data
Before you reach for a chart type, finish this sentence: “After looking at this, the reader should understand ___.” Maybe it's which product sold the most, how revenue moved over the year, or what share each region contributes. That takeaway, not the shape of your spreadsheet, is what should choose the chart.
When in doubt, use a bar chart
People read bar charts more accurately than any other kind, because we're very good at comparing lengths. They work for almost every comparison, they're hard to misread, and nobody has ever been confused by one. Reach for something fancier only when a bar chart genuinely can't tell the story.
Be honest with the axis
For bar charts, start the value axis at zero. A truncated axis makes small differences look dramatic and quietly misleads people. Line charts are the exception: because they show change rather than magnitude, a focused range is fine and often clearer.
Sort by meaning
Order your categories from largest to smallest so the ranking jumps out. Alphabetical order is almost never what the reader cares about. The one exception is a natural sequence like days or months, which should stay in their real order.
Pie charts are dessert, not the main course
A pie chart is great for a quick “this slice is about half” when there are only a few parts of a single whole. The moment you have more than a handful of slices, or you want people to compare exact values, switch to bars. A crowded pie asks the reader to judge angles, which nobody does well.
Strip away everything that isn't the data
Color should highlight, not decorate. Drop the 3D, the heavy gridlines, and the busy backgrounds. If you only have a few series, label them directly instead of making people bounce between a legend and the chart. Every pixel that isn't helping the reader is getting in their way.
One chart, one message
If a chart needs a paragraph to explain, it's probably two charts. A focused visualization that makes a single point will always beat a clever one that tries to show everything at once. When in doubt, split it up.
Still not sure where to begin? Just start with a bar chart. It's the clearest choice for most comparisons, and you can switch chart types anytime without losing your data.