what's verbal noun?

Noun that's created from verb.

A verbal noun is a noun formed from or otherwise corresponding to a verb. Different languages have different types of verbal noun and different ways of forming and using them. An example of a verbal noun in English is the word singing in the sentence "Singing is fun" (this is a noun formed from the verb sing). Verbal nouns may be non-finite verb forms such as infinitives or gerunds in English (or Latin) usage.

when we make a noun from verb that is called verbal noun.

let me know what is this!