
<meta> tag To prevent all search engines that support the no-index rule from indexing a page on your site, place the following <meta> tag into the<head> section of your page:
<meta name="robots" content="noindex"> 
The no-index rule can be implemented using a <meta> tag or an HTTP response header to restrict search engines that recognize the no-index directive, like Google, from indexing certain content. When Googlebot comes across a page with this tag or header, it will remove that page entirely from Google Search results, regardless of whether there are links from other websites.

Typically, it's best to allow robots to follow all links on a webpage. Being overly strict in indicating which links should be followed or marked as no-follow may give the impression that the site is trying to influence how a robot views it.
Page sculpting is the practice of using no-follow commands to influence the transfer of signals between pages. In the best-case scenario, these strategies to manipulate bots are ineffective. In the worst-case scenario, trying to control bots with nofollow may result in penalties.
Before a website's pages can be displayed in search results, search engine bots must first discover all the pages on the site and then analyze them to determine their rankings. The initial phase of finding pages is called crawling, while the subsequent analysis is called indexing.
Crawling starts with bots identifying all the URLs of a website's pages. They primarily find these URLs through internal links within the site or through backlinks from external sites. Once a bot identifies a page’s URL, it retrieves content, including the title, text, images, and additional data, such as the date it was last updated. Restrictions can dictate which files and pages a bot can crawl.
Indexing occurs after the crawling process. During this stage, bots assess all the information collected from the crawl. They evaluate whether the content is valuable and authoritative and identify the topics associated with the page and how it compares to other relevant pages. Additionally, search engine bots will determine which search results a page might appear in, if any, and its position within those results.
Please watch this space for more detailed use cases of SEO tags that you can apply to your organisation's knowledge base.
Cheers,
Kavya Rao,
The Zoho Desk Team