What does 'advance Aragorn on the Fate track' mean, and how do character dice work?

Question

Accepted Answer

Advancing moves a character left, toward lower numbers, making his entrance easier. Each named character adds one die when he enters and removes that die when he is eliminated, up to two extra in each scenario. In the revised reveal rule 'settlement' means a town: the Fellowship may be revealed in a Free Peoples town but not in a city or stronghold.

War of the Ring

What does 'advance Aragorn on the Fate track' mean, and how do character dice work?

War of the Ring

What does 'advance Aragorn on the Fate track' mean, and how do character dice work?