Interactive Features

The biggest advantage of Plotly over static libraries is that charts respond to the user. Readers can zoom into a region, pan across data, and hover to read exact values without you crowding the chart with labels.

Interactivity lets one chart serve both the overview and the detail.

By default, hovering a point shows its x and y values. You can enrich this with hover_data=['col1', 'col2'] to add extra columns, or hover_name='name' to set the bold title of the tooltip.

Good tooltips remove the need for clutter on the plot itself.