You can easily add tooltips to text or images within articles, inside modules, or even 3rd party components and template overrides.
Demo: https://regularlabs.com/tooltips
Add tooltips inside your page or post content on-the-fly by using our WYSIWYG button on the tinyMCE editor. Add tooltips anywhere on your site on-the-fly by using our Live Tooltip button on the WordPress toolbar.
Demo: https://codecanyon.net/item/wordpress-tooltips-ultimate/20556525
CSS3 Tooltips for WordPress is a lightweight, easy-to-use tooltips plugin for WordPress.
Demo: https://codecanyon.net/item/css3-tooltips-for-wordpress/7416713