Model evaluation is a crucial step in the machine learning pipeline that involves assessing the performance of a predictive model using specific metrics to ensure its accuracy and generalizability. It helps in understanding the model's strengths and weaknesses, guiding improvements and ensuring that the model meets the desired objectives before deployment.
Validation metrics are essential tools used to evaluate the performance of a machine learning model, helping to determine if the model's predictions are accurate and reliable. By comparing these metrics across different models or training runs, data scientists can ensure that the chosen model generalizes well to new, unseen data.