I learned that parts of speech help us understand how words work in a sentence.
for example:
Noun:student,book,teacher
verb:read,write,study
Adjective:beautiful,interisting
Adverb:quickly,slowly
pronoun:he,she,they
Preposition:in,on,at
Conjunction:and,but,because
Interjunction:wow,oh
These examples help me understund the eight part of speech.