Please help me understand where I must do the following

Please help me understand where I must do the following changes I need some assistance how to ? thanks

Template Customization
To include a custom search form especially for searching wishlists, place this code in a template file:
<?php do_action('wishlist_search') ?>
There are 2 subdirectories in the plugin directory: emails, and wishlists.
The emails subdirectory contains the email notice template, used to send notices to a wishlist owner when someone buys an item in their wishlist.
The wishlists subdirectory contains template files and CSS used to display wishlist content in a user’s My Account area.
If you want to modify any of those files, FIRST copy the subdirectories to your theme directory under a woocommerce subdirectory. Example: [plugin_dir_name]/emails should be copied to (your_theme_dir_name)/woocommerce/emails. Likewise, the wishlists subdirectory should be copied to woocommerce/wishlists