Comparative and superlative adjectives
The most common use of adjectives is as "positive adjectives", ie use them to assign a feature to a noun

Fast car>
fast car

But also we can use adjectives to compare

Slower car (comparative of inferiority) -

Car as fast as ... (Comparative of equality) -

Fastest car (comparative of superiority) and also we can use to say they are "most"

This car is the most rápido.Esto latter is what we call superlativo.Vamos to see next training in English comparatives (deinferioridad, equality and superiority) and the superlative.