The success of a cloud adoption strategy can be measured through a variety of key performance indicators (KPIs). These can include operational metrics such as uptime, response time, and incident resolution time. Financial metrics such as cost savings and return on investment (ROI) can also be used. Additionally, business outcomes such as improved productivity, faster time to market, and customer satisfaction can be indicative of a successful cloud adoption. It's important to define these KPIs at the beginning of the cloud adoption journey and monitor them regularly.