How do do_action and add_action work?

Question

I am trying to find what exactly do_action and add_action works. I already examine with add_action but for do_action i am trying as new now. This what i tried.

Answer 1

//with do_action we create own tag(hook) use in wordpress Ex. Here I added 1 custom function to call this In add_action I added function name with any custom tag name With do_action(my custom tag name)

function mywork()
{
    echo "display my name";
}

add_action('mytag','mywork');

do_action('mytag');

---add_action()---

hook-specific hook that will affect by function()

 add_action( hook, **function**() )

It will change functionality and behaviour of wordpress by Specific “hook” we can change it and functions method.