Metrics are displayed as Performance Insight Cards on the Activities tab. They are high-level analytic insights that help you stay on target when tracking your marketing spend data.
On the Home tab, click on the Master/Custom Settings hyperlink in the Edit Settings column
On the Settings page, select the Columns tab
On the Columns tab, locate the desired Metric
Note: You can also locate your desired Metric by using the Manage for: drop-down menu, or by typing keywords into the Search bar to filter Metrics by name or type.
Click on your desired Metric to highlight it and select the Delete button
On the Delete Confirmation pop up window, click Yes to verify