All of the code snippets should go into your child themes
functions.php file, unless stated otherwise. Also use
style.css to extend the styling and
images folder, in case you want to add some structural images to enhance the website design.
functions.php file located?
File is located inside your child themes root folder, full path to it should go like this:
wp-content / themes / your-child-theme / functions.php. If you don’t see the file inside your child themes folder, your child theme will not work and you need to create the file manually.