It is essential to examine if your website is utilizing the robots meta tag or the X-Robots-Tag HTTP header to tell search engines not to feature your site in search result pages.
Sometime its necessary to set noindex on our media or webpage.
We can do that in two way, one way is with meta noindex and other way is with noindex http header.
<meta name="robots" content="noindex">
HTTP/1.1 200 OK (...) X-Robots-Tag: noindex (...)
Finally, Please use this tool to check vise-versa for noindex