What is the purpose of `wp_reset_postdata()` after a custom WP_Query loop?

Question

WordPress Fundamental — Medium

What is the purpose of `wp_reset_postdata()` after a custom WP_Query loop?

Accepted Answer

`wp_reset_postdata()` is used after a custom WP_Query loop to restore the global $post variable to the current post in the main query. This ensures that functions like the_title() and the_permalink() work correctly after the custom loop.