There are three degrees of comparision. They are mainly for adjectives.
Positive degree is used when there is only 1 person or thing.
Comparative degree is used when there are two persons or things.
Superlative degree is used when there are more than two persons or things.
Positive: Bengaluru is a developed city.
Comparative: Bengaluru is more developed than Colombo.
Superlative: Bengaluru is the most developed city in India.
(I have given the example of Bengaluru only as an example. Don't take it seriously.)