How Highlight and Share Works
Highlight and Share at its core is a highlighter. If users select some text, the user will be shown a row of enabled social networks.

Highlight and Share when Selecting Text
Highlight and Sharing displays a small pop-up when a reader highlights text on your site.

Text Selection Highlighting
By default, this works on any post or page content. You can customize Highlight and Share to show anywhere using advanced selectors.
You can mark a selection of text as an inline highlight using the Block Editor format option, or wrapping a selection with class
has-inline-text
.
Inline Highlighting
The Click to Share block allows you to heavily customize a "Click to Share" box that a reader can click on to share.

Click to Share Block