When to use a star rating
When there is no room for reviews but there is room for a number. Delivered by the Compact Badge or one of the sticker layouts.
What you can set
Size and alignment
Show or hide the review count and source icon
Star colour and size
Click action
Where it works best
Headers, product listings, next to a price, in a footer.
Every layout takes the same sources — Google, Facebook and 69 others — so the choice here is presentation, not capability.
The other layouts
There are fourteen in the editor and they compete with each other for the same visitor, so it is worth knowing when a different one is the better answer. The full gallery shows each one running.