It means that the website prevented Google from creating a page description, but didn't actually hide the page from Google. If you own this site you can improve this result either by letting Google read the page to create a good description, or by hiding the page entirely from Google Search results.

In order for your website to show up in search results, Google needs to add it to its index. Google uses its index to show websites in relevant search results. If your page or site is missing from Google's index, it won't rank because Google doesn't know it exists.

To solve this issue, start by clearing your browser cache. If it persists, try flushing your DNS. If you still encounter local issues after that, you can try using Google's public DNS.

It can take time for Google to index your page; allow at least a week after submitting a sitemap or a submit to index request before assuming a problem. If your page or site change is recent, check back in a week to see if it is still missing.