Synonyms for hidden links

Definition of hidden links:

Hidden links refer to hyperlinks on a webpage that are intentionally made invisible or very difficult for human users to see, but are still detectable by search engine crawlers. This can be achieved using various methods, such as matching the link's text color to the background, using a tiny font size, or employing CSS properties like 'display: none'. While occasionally used for specific web design or accessibility reasons, they are more commonly associated with black-hat SEO tactics. Websites often use hidden links to manipulate search engine rankings by inserting keywords or linking to other sites without the user's knowledge. Search engines typically penalize websites that engage in such deceptive practices.