Rich snippets appear in Google search results for pages without structured data

Rich snippets appear in Google search results for pages without structured data - Google Search Console is a free application that allows you to identify, troubleshoot, and resolve any issues that Google may encounter as it crawls and attempts to index your website in search results. If you’re not the most technical person in the world, some of the errors you’re likely to encounter there may leave you scratching your head. We wanted to make it a bit easier, so we put together this handy set of tips about google-search, schema.org, rich-snippets, structured-data to guide you along the way. Read the discuss below, we share some tips to fix the issue about Rich snippets appear in Google search results for pages without structured data.Problem :

I was wondering if there's a way to get Google to display rich text results without implementing any kind of structured data.

When Google displays a link to a page, it may also display some extra information under the link. This is what Google refers to as "rich snippets" or "rich results". So, for a product page, it could list things like warranty information, rating, price, brand, etc.

I came across a search result for a website that displays some of that extra information, but when I scanned it using Google's Rich Results Test tool, it didn't seem to have any kind of structured data, and it says

This page is not eligible for rich results.

This is rather puzzling. What am I missing? Is there another way to indicate to the Google crawler which information to use? Do I absolutely have to implement Google's structured data in order for these extra bits of information to appear?

Example:

As can be seen in the image below, it lists rating, reviews, price range and "In Stock"

Solution :

In the article "Google: structured data not required for rich snippets but recommended" published on Search Engine Roundtable on Nov 1, 2017, one can read:

Google's John Mueller confirmed on Twitter that technically, you do not need structured data for Google to apply rich snippets in the search results to your site. John added that although it is not needed, it would be rare to see a search result with rich snippets that does not also use structured data. So obviously it is recommended that you use structured data on your site so that you can help ensure you get rich snippets in the Google search results.

I imagine that Google algorithms identify keywords and frequently used patterns to extract relevant data and use them in rich snippets.

If the issue about google-search, schema.org, rich-snippets, structured-data is resolved, there’s a good chance that your content will get indexed and you’ll start to show up in Google search results. This means a greater chance to drive organic search traffic to your site.