# Interpolate variables in panel plugins

Variables are placeholders for values, and you can use them to create templated queries, and dashboard or panel links. For more information on variables, refer to [Templates and variables](https://grafana.com/docs/grafana/latest/dashboards/variables).

Grafana provides helper functions to interpolate variables in a string template. The `replaceVariables` function is available in the `PanelProps`.

Add `replaceVariables` to the argument list, and pass a user-defined template string to it:

```tsx
export function SimplePanel({ options, data, width, height, replaceVariables }: Props) {
  const query = replaceVariables('Now displaying $service');

  return <div>{query}</div>;
}

```