I would like to add some text to my HTML that is not accessible or indexed by search bots.
Is it possible to have visible text on a site that is not accessible to search bots?
Yes there are a few ways:
User-agent: * Disallow: /something.html
<meta name="robots" content="noindex">
<noindex>tag. Note that it's not supported by all search-robots;
<noindex>this may be seen by some of them</noindex>