Your marketing strategy is only as strong as what you can measure.This guide introduces the most important KPIs for tracking digital marketing performance, from return on investment and customer acquisition cost, to bounce rates, time on site, and traffic sources. Learn how to interpret data, adjust campaigns based on real insights, and set measurable goals that align with your business objectives. Whether you’re running ads, email campaigns, or SEO strategies, understanding these metrics will help you make smarter decisions and achieve better results.