GD Rating System (Free and Pro) include addon for integrating rating or review rich snippets into page content. This article will explain how this works and how Google will use the rating snippets from your website.

Google Rich Snippets

Google uses structured data markup from websites it crawls to better understand and organize search results. And, some of the structured data is used to generate enhanced search result in form of a rich snippet. Through the years, Google has added many elements into rich snippets specification, but among the first snippets added is for ratings.

There are two types of rating based snippets. One is for reviews where the single rating is used in a review capacity. And the other is the aggregated rating of multiple reviews or ratings. There are different ways to add snippets into the HTML of the page, and Google uses standards for this in form of Microdata, RDF or JSON-LD. Ratings and reviews support Microdata and JSON-LD formats, with JSON-LD being the default. RDF is an old format, and it is not used as much anymore.

Rich Snippets are invisible elements of the page (especially if used with the JSON-LD format that is currently the recommended by Google), and to determine if the page contains the snippet, and if the snippet is valid, you need to use Google Testing tool.

Testing the page with the snippet

To make sure you page snippet works as expected, you need to test your pages. This is very important in the beginning when you make tweaks and changes to make sure it is OK. Tests can be done with the Google Structured Data Testing Tool. It allows tests from URL or you can insert HTML of your page (this is useful when you test from localhost). If the testing tool finds some errors, you will see them marked in the results panel. This testing tool shows all types of snippets, not only rating or review.

Rating types in the snippet

GD Rating System can add both available rating result types into most snippets: aggregated ratings and rating review. Some snippet types can include both and some only review rating.

Rating snippets in GD Rating System

GD Rating System supports both types of rating/review snippets Google uses. Markup is added using Microdata or JSON-LD format. There are no plans to support RDF format.

It is highly recommended to use JSON-LD format, it is used by all major search engines that support rich snippets, and it offers great flexibility

Adding markup to HTML can be a very complex process for the CMS based system like WordPress. Rendering of page content is controlled by the theme and each theme does that in different ways. Add to that other plugin that can influence rendering, and there is very little chance of adding special markup for ratings into existing HTML markup.

Legacy Rich Snippets

GD Rating System Lite/Free and Pro versions include basic rich snippets support called ‘Legacy Rich Snippets’. This is the original system available from the first plugin version, and it contains basic settings to set the type of the snippet and select which rating method data to use, and the plugin does the rest. But, this is the limited system, it generates the ratings, and wraps it into basic snippet with mostly autogenerated data. But, for some complex rich snippets, that is not enough.

And, because of that, GD Rating System Pro since version 3.3 includes brand new rich snippets system that is exclusive to Pro version (it will not be added to Free version).

New Rich Snippets

New rich snippets support in GD Rating System Pro is based around the snippet types and the fact that each type might have own unique elements that need to be set for each post individually. So, the workflow is like this: in the global settings, enable general snippet types for each post type, and select rating methods to use. And, for each individual post, you will be able to change this. When you edit posts, you will need to fill in extra data for selected rich snippet type. For many types, you don’t need to do anything, the plugin will fill the data, but for Product type, for instance, you need to add price offers and other in information. Search Engines will require for the snippets to be fully set up, or they will fail.

If you prefer using this system, simply disable Legacy support from the global settings panel: Rating System -> Settings -> Rich Snippets -> Legacy (on top of the page).

Extra Rich Snippet types

New Rich Snippets system has methods to implement additional snippet types with own settings, own rendering for the snippet. For now, the plugin has an addon that will add Recipe Rich Snippet type with extra data needed for recipes (ingredients, nutritional values…). More such addons will be added in the future.

How snippets data is used

So, how Google uses snippets? Well, that is not documented and Google is very secretive about this:

  1. There is no guarantee Google will grab any rich snippets data from your pages.
  2. There is no guarantee that Google will use rich snippets data from your pages.
  3. There is no way you can force Google to extract or use rich snippets from your pages.
  4. Website reputation is one of the factors Google considers for using rich snippets.

What can you do to prepare the best you can for Google extracting and using rich snippets? Well, based on a lot of topics read on the subject, experience, and testing, there are some things you should do to prepare.

  1. Make sure you add your website into Google Search Console (former Webmaster Tools). This is a very powerful tool that will give you a lot of information related to your website. For rich snippets, you need to use Structured Data tool located under Search Appearance menu. This will show all structured data and rich snippets Google has found on your website. There you will see Review and Aggregated Rating elements and which pages have them and Google extracted it from. This is not all pages with rich snippets but pages Google used so far.
  2. Again, in Google Search Console you have a useful tool that can speed up the Google crawl rate and make Google visit your website at the faster rate and that will improve your chances for the rich snippet to be extracted. This can be done from the Site Settings page for each website you have in the Search Console. Normally, crawl rate is set to automatic, but you can set it to a higher value for a limited time. Do not overdo it, 0.05 requests per second are enough. Again, this doesn’t guarantee that Google will obey this, but from my experience, the number of hits my website got from Google increased after setting higher value here.
  3. It is a good idea to have posts/pages with a higher number of votes recorded, it is considered as better value for inclusion. Reviews are always considered as good value, but it is a good idea to provide subject and description along with the review value.
  4. Be patient. There is no way to force this, but using the Search Console you can monitor extracted structured data and confirm that your rich snippets are used.

Other search engines

GD Rating System implements rich snippets for ratings according to and Google implementation. All ratings pass the Google verification tool. Other search engines that support rich snippets might do things differently. Currently, Bing and Yandex allow rich snippets to some extent.


Bing supports rich snippets for rating according to and validates ratings added with GD Rating System without problems.

Validator URL:


Yandex should support rich snippets, but this is not documented properly by Yandex. It states that is supported, but their validation is not able to validate even the simplest tags, and the ratings don’t validate also. Messages displayed don’t make any sense and they don’t reflect the specification. GD Rating System can’t support this search engine until their markup is clearly defined and up to the specification of

Validator URL:

How other websites are using rich snippets

I have analyzed close to 20 websites that have rating rich snippets listed and displayed in Google search results. In most cases, websites are using very similar markup as GD Rating System is generating, all data is stored in META tags and it is not visible directly to visitors. Here are some bigger websites with rich snippets:

  1. Google own Play Store is using META tags for aggregated ratings for both rating value and number of votes.
  2. IMDb uses a classic method where the visible data is wrapped in span tags with the rating and votes property.
  3. Amazon is not using any form of rich snippets that we know of, but ratings are still used and displayed in search results.
  4. Discogs website is using META tags for aggregated ratings for both rating value and number of votes.
  5. GoodReads uses completely broken aggregated rating, and a testing tool is marking it as broken, but still, Google uses these ratings in search results.
  6. Apple iTunes uses a classic method for wrapping visible data in span tags for rating and votes.
  7. Metacritic uses some hybrid version, with some elements wrapped in SPAN and visible, and some as META.
  8. RottenTomatos also uses a hybrid version, but it also includes multiple rating on the page (and that is against Google rules), and still, ratings are displayed in search results.

So, as you can see, Google rules are one thing, but different websites are doing different things and some are used even if invalid. Also, all these websites have a lot of pages with ratings, but Google is not showing rating results for all pages that have rating snippets, it is still selective even for large websites like these.

What’s next?

Well, as you can see, it requires some work and a lot of luck to get your rating into Google search results. And GD Rating System does a great job of creating snippets that are fully valid and recognized by Google. I plan to improve the snippets over time depending on the way Google evolves the snippets specification.

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