Google Filters ‘Misleading’ Emojis from Snippets
Misleading emojis, such as stars which could look like reviews, may be filtered from snippets, otherwise they try to allow for unusual characters.
Abuse of Schema Policy May Result in a Sitewide Manual Action for the Specific Type of Rich Result
Usually if you go against schema policy, a manual action for the specific type of rich result could be applied for the entire site until a reconsideration process is completed.
Google May Introduce Rich Results Types to One Country First Before Rolling Them Out
With some rich results types Google may introduce them first to one country in order to understand the right approach and how it should be handled, before rolling them out globally.
FAQ & Rich Results May Not Appear Every Time Your Page is Displayed in Search Results
FAQ schema is not guaranteed to appear every time the page is displayed in search results. This is similar to rich results, where Google will look at different factors before showing them. Google also tries to limit the rich result types seen in search results, to prevent them from becoming overloaded.
Rich Snippets Only Displayed in Search Results if Required Conditions Are Met
Google will only show rich snippet results if the required conditions are met. This includes ensuring the markup is technically correct, which you can confirm using a testing tool, as well as making sure it is logically correct. The final requirement is ensuring the website contains quality content so that Google can trust the information that is being provided.
Changes to Review Rich Snippets Limit Available Review Types
The changes made to Review Rich Snippets means Google have limited the support to a certain set of markup types, as well as amending the approach to reviewing your own entity.
Rich Snippets Spam Report Tells Google About Manipulated Structured Data
Use the rich snippets spam report form to inform Google about instances of manipulated structured data.
Valid Structured Markup Is Not Necessarily Sufficient for Rich Results
Rich results won’t necessarily appear just because Google’s testing tools say that the structured markup on that page is valid. John recommends reading the relevant developer documents to find out about other requirements for specific rich results.
Google More Cautious Displaying Rich Results When Unsure About Structured Data Implementation
Google has algorithms which decide when it makes sense to display structured data as rich results. If Google is unsure about a website or the way structured data has been implemented, then it will be more cautious in displaying structured data as rich results.