billizzard

It allows you to easily and easily create tooltips for words, phrases and in general for any content. 
The contents of the tips limits only your imagination. The appearance of the tips is very easy to customize as you need. 
The plugin is easier to use and more efficient than its counterparts. Requires at least ACF plugin 5.7.
<iframe loading="lazy" title="Wordpress NnSmartTooltip plugin (Enable subtitles)" width="750" height="422" src="https://www.youtube.com/embed/KwczeKdV2bs?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

NnSmartTooltip

 Very simple to use. Without shortcodes or anything else.

Great plugin

Allows you to simply create tips with any content and any styles.

Mark

Adds a simple ‘Post-it’ widget to the Dashboard that allows you to leave yourself or other authors a note. The plugin can be configured and moved around as any other Dashboard widget. It will accept plain text or (sanitized) HTML. Only users with the capability “Edit dashboard” can edit the note.
This simple plugin is based on code from <a href="http://wpengineer.com/add-wordpress-dashboard-widgets/" title="Add WordPress Dashboard widgets" rel="nofollow ugc">WP Engineer</a> and <a href="http://rick.jinlabs.com/2009/02/01/how-add-options-to-your-wordpress-27-dashboard-widgets/" title="How to add options to your WordPress 2.7 Dashboard widgets" rel="nofollow ugc">Ricardo González Castro</a>. Leave your comments <a href="http://ideophone.org/dashboard-post-it/" title="Dashboard Post-it homepage" rel="nofollow ugc">here</a>.
Warning Your notes will be replaced by boilerplate text upon upgrading. Make sure to copy the content somewhere else before you upgrade and then paste it into the new version. Sorry about that!

Dashboard Post-it

Adds a simple 'Post-it' widget to the Dashboard that allows you to leave yourself or other authors a note.

NnSmartTooltip vs Dashboard Post-it