How to add Wordpress Jetpack subscription form using shortcodes.

wordpress_jetpack_subscription_shortcodes.php

/* 
   The Wordpress Jetpack plugin offers a subscription widget that can be added via shortcodes.
   
   To enable:
   1. Open the Wordpress template file (e.g. footer.php) containing the desired location of the widget.
      These are located in /wp-content/themes/[YOUR THEME]/
   2. Paste the code snippet below into your template file in the required location.
   3. Replace the [PARAMETER n] values with your desired values.
   4. Save to have the changes take effect.
   
*/

<?php 
   echo do_shortcode('[jetpack_subscription_form title="[PARAMETER TITLE]" subscribe_placeholder="[PARAMETER PLACEHOLDER]" subscribe_text="[PARAMETER TEXT]" subscribe_button="[PARAMETER BUTTON]" success_message="[PARAMETER SUCCESS]"]'); 
?>

/* 
   The available shortcodes are:

      title - the title of the subscription form, for example "Subscribe to the newsletter"
      subscribe_text - a line of text above the input box, for example "Sign up for emails"
      subscribe_placeholder - the placeholder text in the input box, for example "Enter email here"
      subscribe_button - the text that appears on the submit button, for example "Sign Up"
      success_message - the text to be displayed upon successful submission of the subscription form, for example "Thanks for subscribing"
      
*/

Example output:

Thank you for writing this!