Here are some examples:
* He went to the store. (He replaces the noun "John")
* She is a talented musician. (She replaces the noun "Mary")
* It is raining outside. (It replaces the noun "rain")
* They are going to the beach. (They replaces the noun "the group of friends")
* We are going to the movies. (We replaces the noun "myself and others")
* You should try that new restaurant. (You replaces the noun "the person being addressed")
* This is my favorite book. (This replaces the noun "book")
* That is a beautiful painting. (That replaces the noun "painting")
* These are my shoes. (These replaces the noun "shoes")
* Those are the flowers I planted. (Those replaces the noun "flowers")
Pronouns help us avoid repeating nouns and make our writing and speaking more concise and elegant.