It is an interesting test to look for from Google Search. As you type in a query, goes to the search results, and as when you scroll down through the results, the search box appears to display suggestions. Google shows several grayed out suggestions to the queries.
Here’s How It Looks Like
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As you can see the query was “puzzle games” and it scroll down, Google displays suggestions such as “for adults” or “download” or “unblocked” and more.
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