Jonathan Bardo

Note: This plugin only works with WordPress 4.2 or higher
This plugin will enable the site administrator to easily create an admin message present on all pages. The admin has the option to let the user dismiss the message for the duration of his session.

Admin User Message

This does just what I want. Thanks for making it. :)
It's definitely better than https://wordpress.org/plugins/admin-screen-messages
You might want to also tag it as:
https://wordpress.org/plugins/tags/admin-message



Perfect

Add message to users of your site. Choose wheter they can dismiss it or not.

Jack - BNFW

Better Notifications for WP Support

Better Notifications for WP is a simple but powerful plugin for that allows you to customise the email notifications that WordPress sends using a WYSIWYG editor and shortcodes. All of the default WordPress email notifications are available to customise as well as lots of new ones. You can choose to send notifications to individual users, multiple users, all users in a user role, multiple roles – you name it! You can also power-up your notifications with <a href="https://betternotificationsforwp.com/downloads/" rel="nofollow ugc">Premium Add-ons</a>. Emails are sent out via your WordPress website (using <code>wp_mail</code>) but can be sent via SMTP using a 3rd party plugin should you wish. 
If you want to let users create their own email notifications/subscriptions/alerts, check out my other plugin: <a href="https://contentnotify.com" rel="nofollow ugc">Content Notify</a>.
Here’s a quick walkthrough of the plugin in action: 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/MxPUyRZPJ1Q?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h4>An Example:</h4>
You want all the users in the Editor role to be notified via email when a new post is published and you’d like to customise it to include your logo along with the author’s name and date / time it was published – with this plugin, that’s easy.
<blockquote>
A handy list of shortcodes you can use is available <a href="https://betternotificationsforwp.com/documentation/notifications/shortcodes/" title="Shortcodes for use in Better Notifications for WP" rel="nofollow ugc">here</a>.
</blockquote>
<h4>Premium Add-ons</h4>
Power-up your notifications using add-ons:
<a href="https://betternotificationsforwp.com/add-on-bundles/" rel="nofollow ugc">Notification Add-on Bundles</a> – Everything you need for your WordPress notifications. Save big when you buy an add-on bundle. Instant access.
<a href="https://betternotificationsforwp.com/downloads/subscriptions-gdpr/" rel="nofollow ugc">Subscriptions (GDPR)</a> – Allow users to manage their subscriptions for BNFW notifications. 
If you want to let users create their own email notifications/subscriptions/alerts, check out my other plugin: <a href="https://contentnotify.com" rel="nofollow ugc">Content Notify</a>.
<a href="https://betternotificationsforwp.com/downloads/conditional-notifications/" rel="nofollow ugc">Conditional Notifications</a> – Limit certain notifications depending on which categories, tags, post formats, or terms you choose.
<a href="https://betternotificationsforwp.com/downloads/custom-fields/" rel="nofollow ugc">Custom Fields</a> – Provides a number of new shortcodes allowing you to include data from custom fields and custom user fields created using <a href="https://wordpress.org/plugins/advanced-custom-fields/" rel="ugc">ACF</a>.
<a href="https://betternotificationsforwp.com/downloads/send-to-any-email/" rel="nofollow ugc">Send to Any Email</a> – Send notifications to non-WordPress Users.
<a href="https://betternotificationsforwp.com/downloads/digest/" rel="nofollow ugc">Digest</a> – Group multiple notifications into a single digest notification.
<a href="https://betternotificationsforwp.com/downloads/per-post-override/" rel="nofollow ugc">Global Override</a> – Override some of the settings of notifications directly when editing a post, page, or custom post type.
<a href="https://betternotificationsforwp.com/downloads/update-reminder/" rel="nofollow ugc">Reminders</a> – Send a reminder to your users and/or user roles when a post, page, or custom post type hasn’t been updated after a set amount of time. Also send a notification when a user hasn’t logged in for a set amount of time.
<a href="https://betternotificationsforwp.com/downloads/multisite/" rel="nofollow ugc">Multisite</a> – Adds new notifications and shortcodes for WordPress Multisite to Better Notifications for WP.
<a href="https://betternotificationsforwp.com/downloads/profile-builder/" rel="nofollow ugc">Profile Builder</a> – Adds compatibility and new notifications and shortcodes for Profile Builder Free, Hobbyist, and Pro plugins to Better Notifications for WP.
…and more coming soon!
<h4>Notifications</h4>
The notifications that are currently available to use are:
Admin
<ul>
<li>New User Registration – For Admin</li>
<li>User Lost Password – For Admin</li>
<li>Password Changed – For Admin</li>
<li>User Email Changed – For Admin</li>
<li>User Role Changed – For Admin</li>
<li>User Logged In – For Admin</li>
<li>WordPress Core Automatic Background Updates</li>
<li>Privacy – Confirm Action: Export Data Request – For Admin</li>
<li>Privacy – Confirm Action: Erase Data Request – For Admin</li>
</ul>
Transactional
<ul>
<li>New User Registration – For User</li>
<li>New User – Post-registration Email</li>
<li>User Lost Password – For User</li>
<li>Password Changed – For User</li>
<li>User Email Changed Confirmation – For User</li>
<li>User Email Changed – For User</li>
<li>User Role Changed – For User</li>
<li>User Logged In – For User</li>
<li>Comment Reply</li>
<li>Privacy – Confirm Action: Export Data Request – For User</li>
<li>Privacy – Confirm Action: Erase Data Request – For User</li>
<li>Privacy – Data Export – For User</li>
<li>Privacy – Data Erased – For User</li>
<li>Profile Builder – Approval Request for Admin (<a href="https://betternotificationsforwp.com/downloads/profile-builder/" rel="nofollow ugc">Profile Builder Add-on</a>)</li>
<li>Profile Builder – Email Confirmation (<a href="https://betternotificationsforwp.com/downloads/profile-builder/" rel="nofollow ugc">Profile Builder Add-on</a>)</li>
<li>Profile Builder – Account Approved (<a href="https://betternotificationsforwp.com/downloads/profile-builder/" rel="nofollow ugc">Profile Builder Add-on</a>)</li>
<li>Profile Builder – Account Unapproved (<a href="https://betternotificationsforwp.com/downloads/profile-builder/" rel="nofollow ugc">Profile Builder Add-on</a>)</li>
<li>User Login Reminder (<a href="https://betternotificationsforwp.com/downloads/custom-fields/" rel="nofollow ugc">Reminders Add-on</a>)</li>
</ul>
Posts / Custom Post Types
<ul>
<li>New Post Published</li>
<li>Post Updated</li>
<li>Post Pending Review</li>
<li>New Private Post</li>
<li>Post Scheduled</li>
<li>Published Post Moved to Trash</li>
<li>New Comment</li>
<li>New Comment Awaiting Moderation</li>
<li>Post – Comment Approved</li>
<li>Post – Custom Field Updated (<a href="https://betternotificationsforwp.com/downloads/custom-fields/" rel="nofollow ugc">Custom Fields Add-on</a>)</li>
<li>Post – Update Reminder (<a href="https://betternotificationsforwp.com/downloads/update-reminder/" rel="nofollow ugc">Reminders Add-on</a>)</li>
<li>New Trackback</li>
<li>New Pingback</li>
</ul>
Pages
<ul>
<li>New Page Published</li>
<li>Page Updated</li>
<li>Page Pending Review</li>
<li>New Private Page</li>
<li>Page Scheduled</li>
<li>Page – New Comment</li>
<li>Page – New Comment Awaiting Moderation</li>
<li>Page – Comment Approved</li>
<li>Page – Comment Reply</li>
<li>Page – Custom Field Updated (<a href="https://betternotificationsforwp.com/downloads/custom-fields/" rel="nofollow ugc">Custom Fields Add-on</a>)</li>
<li>Page – Update Reminder (<a href="https://betternotificationsforwp.com/downloads/update-reminder/" rel="nofollow ugc">Reminders Add-on</a>)</li>
</ul>
Media
<ul>
<li>New Media Published</li>
<li>Media Updated</li>
<li>Media – New Comment</li>
<li>Media – New Comment Awaiting Moderation</li>
<li>Media – Comment Approved</li>
<li>Media – Comment Reply</li>
</ul>
Posts
<ul>
<li>New Category</li>
<li>New Tag</li>
</ul>
Custom Post Types
<ul>
<li>New Term</li>
</ul>
Multisite (<a href="https://betternotificationsforwp.com/downloads/multisite/" rel="nofollow ugc">Multisite Add-on</a>)
<ul>
<li>New Site Activated or Created – For Network Admin</li>
<li>New User Created – For Network Admin</li>
<li>Network Admin Email Change Attempted – For New Network Admin</li>
<li>Network Admin Email Changed – For Old Network Admin</li>
<li>New Site Activated or Created – For Site Admin</li>
<li>Site Deleted – For Site Admin</li>
<li>Site Admin Email Change Attempted – For New Site Admin</li>
<li>Site Admin Email Changed – For Old Site Admin</li>
<li>New Site Activated – For User</li>
<li>New User Created – For User</li>
<li>New User Invited to Site – For User</li>
</ul>
If you’d like to see a notification in the list above, please drop me a line in the forum and I’ll see what I can do to add it.
If you want to let users create their own email notifications/subscriptions/alerts, check out my other plugin: <a href="https://contentnotify.com" rel="nofollow ugc">Content Notify</a>.
<blockquote>
Like this plugin? Please leave it <a href="https://wordpress.org/support/plugin/bnfw/reviews/?rate=5#new-post" rel="ugc">a great review</a>! Don’t think the plugin is worthy of 5 stars? Having problems? Let me know in the <a href="https://wordpress.org/support/plugin/bnfw/" rel="ugc">forum</a> and I’ll do my best to help.
DISCLAIMER 
 This is an incredibly useful and highly rated plugin however, it’s possible that overuse or abuse of this plugin could upset your users by sending them too many notifications. By downloading / installing / using this plugin, you take full responsibility of the management / quantity / types of notifications that are sent out from it including abiding by any SPAM laws in your country / operating areas, dealing with / responding to subscription / unsubscription requests, complaints, and so on. I accept no liability or responsibility for SPAM or abuse of this plugin from the user(s) of or anyone that may receive notifications as a result of the use of this plugin. I’m trusting you, please don’t abuse your users.
</blockquote>

Customize WordPress Emails and Alerts – Better Notifications for WP

This makes notifications so easy, highly recommended.

Fantastic plugin!


2 Years in my website ... it saved me a lot of works !!good plugin !!


Works Good

Supercharge your WordPress email notifications using a WYSIWYG editor and shortcodes. Default and new notifications available. Add-ons available.

Admin User Message vs Customize WordPress Emails and Alerts – Better Notifications for WP