Customizing chart labels is a key part of making your data visualizations clear and effective. Chart.js offers flexible options to style and format axis labels, legends, and tooltips. For axis labels, you can change the displayed text, adjust color, font size, and style to match your design or highlight important information. The legend can be shown or hidden, and its label appearance can be tailored for better integration with your chart. Tooltips can be made more informative by using callbacks to format the content, such as adding currency symbols or descriptive text. These customizations help users quickly understand what the chart represents and reduce confusion by making important details stand out. Thoughtful label customization improves readability and ensures your audience can interpret the data accurately.