First of all that is for genesis and your using avada, the two themes will have different hooks. You will need to figure out what hook is available in avada to insert content between the title and the excerpt. I can’t help you with that and you need to look at the avada documentation to see if it’s possible or contact avada support to get that answer. Once you figure out the correct hook to use then you edit the functions.php file for your theme to add the code you want to run for the action.
