Adjectives describe nouns. They can be classified according to the type of feature they describe, such as size, appearance, mood, etc.
Jimmy was happy because he had a big red balloon.
Adjectives can also be classified according to their intensity or strength.
Joe was peckish.
Joe was hungry.
Joe was famished.
All these sentences show that Joe was hungry, but the first one tells us that he was only a little bit hungry, while the last one tells us that he was very hungry.
The sentence Joe was famished is more interesting than Joe was very hungry. If you can, it is better to choose a specific adjective rather than using the words quite and very.