How do you track and monitor the effectiveness of training sessions?

Every training organization has its own way of monitoring training performance, whether incorporated into the learning management system or done separately through different tools. For example, online assessments and features within a software program can be tailored to evaluate learners at every phase, and results can be reviewed through a metrics dashboard. Share some of the tools and methods that you have found the most helpful for tracking and monitoring the impact of your training sessions. A successful answer will include key performance indicators specific to training.