Progress tracking in machine learning means watching how well the model learns over time. The key metrics are training loss and validation loss. Loss tells us how far the model's guesses are from the true answers. Lower loss means better learning.
We also track accuracy or other performance scores on validation data to see if the model is improving on new, unseen data. This helps us know if the model is learning well or just memorizing.
Tracking these metrics after each training step or epoch helps us report progress clearly and decide when to stop training or adjust settings.