I need to add a text to the homepage but, one that is not visible immediately to visitors. This because it affects design, so I posted this text with a "click here to display" css. Is this bad for SEO? What do you think?
If this text is useful and finally shown to the user, it is OK: Hidden text doesn't improve rankings: but can still be found:
Display some part of the text with a "read more" button. That is better. Like quora does in answers. If answer is very long, they display little of it, and a button "continue reading", clicking which opens the rest of the answer.