This template demonstrates how to use the Metric Card widget in Kelp. Metric Cards are useful for displaying key metrics or key performance indicators (KPIs) in an easy-to-read format. They can be customized to show a single or multiple metrics, highlight the primary metric, indicate changes in the metric over time, and display the unit of measurement. Additionally, Metric Cards can include a sparkline history of the primary metric and can be set to interactive mode. The template includes code snippets that can be copied and used in your own projects.