Pre-flight your posts.

Noted That:

To install correctly this publishing-checklist.zip.
Fisrt Download the publishing-checklist.zip to your computer
Extract/Open publishing-checklist.zip to Your Computer.
Then, Find readme.txt file inside publishing-checklist.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "publishing-checklist.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "publishing-checklist.zip" Downloaded plugin from your computer, Where you downloaded publishing-checklist.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Publishing Checklist" folder is added on left sidemenu. Now, Click on "Publishing Checklist" folder.

Noted that: If you do not see "Publishing Checklist" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Publishing Checklist Configurtions and Settings or How to work "Publishing Checklist" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Publishing Checklist" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Publishing Checklist
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
It’s a plugin! Install it like any other. Once you’ve done so, you’ll need to register the checklist items and callbacks for your site. Here’s a simple example that checks for a featured image. `php add_action( ‘publishing_checklist_init’, function() { $args = array( ‘label’ => esc_html__( ‘Featured Image’, ‘demo_publishing_checklist’ ), ‘callback’ => function ( $post_id ) { return has_post_thumbnail( $post_id ); }, ‘explanation’ => esc_html__( ‘A featured image is required.’, ‘demo_publishing_checklist’ ), ‘post_type’ => array( ‘post’ ), ); Publishing_Checklist()->register_task( ‘demo-featured-image’, $args ); }); `

It’s a plugin! Install it like any other.

Once you’ve done so, you’ll need to register the checklist items and callbacks for your site. Here’s a simple example that checks for a featured image.

`php

add_action( ‘publishing_checklist_init’, function() {
$args = array(
‘label’ => esc_html__( ‘Featured Image’, ‘demo_publishing_checklist’ ),
‘callback’ => function ( $post_id ) {
return has_post_thumbnail( $post_id );
},
‘explanation’ => esc_html__( ‘A featured image is required.’, ‘demo_publishing_checklist’ ),
‘post_type’ => array( ‘post’ ),
);
Publishing_Checklist()->register_task( ‘demo-featured-image’, $args );
});
`

posts, your, flight,

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Reffered: https://wordpress.org/