What are Interjections

Interjection is a word or phrase that expresses a sudden emotion

Example
Hurray!,We won the match

Here,'Hurray!' is an Interjection

Note:-

Interjections always end with exclamation mark !

Shhh!. ..dont make noise

Here,'Shhh!' is an Interjection

Alas! , we lost the game

Here,'Alas!' is an Interjection

Oh! , I didn't know about that

Here,'Oh!' is an Interjection