The success of a digital marketing campaign is measured using various key performance indicators (KPIs) tailored to the campaign’s objectives. Common metrics include conversion rate, return on investment (ROI), click-through rate (CTR), cost per acquisition (CPA), engagement metrics, traffic sources, bounce rate, customer lifetime value (CLV), brand awareness, and customer feedback. By regularly monitoring these metrics, businesses can gauge the effectiveness of their campaigns and make necessary adjustments for optimal results.