where to put snippets

hi, i found some helpful functionality in
https://wpjobmanager.com/customization-snippets/
which i want to add to my site .

where should i add the code?
functions.php, templates or,
having some concerns in changing php code when unnecessary,
could i use code snipeets?

• This topic was modified 5 years, 10 months ago by savvaskef1978.