A noun designates a particular person, place, animal, concept, emotion, thing, etc. There are many types of nouns. Any unique name refers to a proper noun. As a result, proper nouns are used when referring to something or someone in particular, such as India, Damini, etc. Proper nouns refer to something in particular, and they usually begin with a capitalised letter.
The abstract noun refers to something that is not quantifiable/tangible(that we cannot see but only fee). E.g. Kindness, hatred.
Countable nouns are the ones that can be counted/quantified. E.g. Apples, cars.