Marcelo Pedra

AMPM Dashboard Admin Note adds an “Important Note” widget to the WordPress Dashboard (wp-admin → Dashboard). Only administrators (capability <code>manage_options</code>) and (in Multisite) Super Admins can view and edit it.
Features:
<ul>
<li>Visual editor (TinyMCE) inside the dashboard widget.</li>
<li>AJAX saving with feedback (“Saving…” label + spinner).</li>
<li>Strict sanitization via allowlist (wp_kses) and limited inline styles (color, background-color, text-align).</li>
<li>Links forced to <code>target="_blank"</code> with <code>rel="nofollow noopener noreferrer"</code>.</li>
<li>Widget severity/color: Neutral / Info / Warning / Error.</li>
<li>Shows: “Modified by: user_login (Display Name. ID: X) — date/time” using the site timezone configured in WordPress.</li>
<li>Multisite-friendly: stored per site (blog) by default.</li>
</ul>
<h3>Translations</h3>
<ul>
<li>English (Default)</li>
<li>Spanish (Español)</li>
<li>Argentinean Spanish (Español de Argentina)</li>
<li>Dutch (Nederlands)</li>
<li>French (Français)</li>
<li>German (Deutsch)</li>
<li>Italian (Italiano)</li>
<li>Portuguese (Português brasileiro)</li>
</ul>

AMPM Dashboard Admin Note

Displays a single admin-only Dashboard widget (“Important Note”) with TinyMCE editing and AJAX save.

minhlaobao

WordPress admin note. 
Thanks you for using plugin.
Welcome to my site: http://begood.vn 
<a href="http://begood.vn" rel="nofollow ugc">Vietsub</a>

Admin Notes

Create notes for admin, one can assign to certain members easily.

AMPM Dashboard Admin Note vs Admin Notes