Imagine you want to add a link but you absolutely don’t want it can be followed by any robot.
Of course, you can add a nofollow attribute, but then It is up to robots to honor this request.
The best way to add a hidden link is using the HTML tag <span> instead of <a> and making it clickable through JavaScript.
If for example you want to hide the link:
<a href="https://wordpress.org">Sample link</a>
You can replace it with:
<span onclick="location.href='https://wordpress.org';">Sample Link</span>
Clicking on the “Sample link” the JavaScript code will still open the linked web page, but no robots will consider it as a link.
If you want to convert a link to a hidden link on your WordPress website, you can download the plugin Hide Link.
After activation, you need just to add #hide-this-link to the URL of the links that you want to hide.
If for example, you want to hide https://domain-example.com, just replace it with https://domain-example.com#hide-this-link.