Hidden text is computer text that is displayed in such a way as to be invisible or unreadable.

Hiding text or links in your content to manipulate Google's search rankings can be seen as deceptive and is a violation of Google's Webmaster Guidelines.

Hidden Text are those texts which are hidden by webmasters from people and specially used for search engine robots.

Concealed content means, content which guest can't find in the site. this strategy is called dark cap procedure. In the event that Google get you will get restricted for doing this.

Hidden text is computer text that is displayed in such a way as to be invisible or unreadable.