should i remove na or replace with 0 in r code example

Example 1: r replace na with 0

d[is.na(d)] <- 0

Example 2: replace na with 0 in R

library(dplyr)
#Replacing missing values with 0 in columns 'x' and 'y' of the tibble dataframe 'df'
df %>% 
  replace_na(list(x = 0, y = 0))