Collect Data: Gather the data you want to visualize, such as open rates, click rates, or conversion rates. Choose a Tool: Use a data visualization tool like Excel, Google Sheets, or specialized email marketing software. Input Data: Enter your data into the tool, ensuring it is organized by time periods (e.g., days, weeks, or months). Generate Chart: Use the tool's line chart function to generate the chart. Customize: Customize the chart by adding labels, legends, and other elements to make it more readable.