According to Tech Crunch, Facebook has started testing its first ads on Facebook Stories. The five to 15 second video ads, allow users to skip through and as yet, there is no ability to click-through or a call to action function. Facebook plans to add these functions soon.
The chart below shows daily usage of stories functions across the platforms.
You can read more about what Facebook is up to on Tech Crunch – https://tcrn.ch/2sPpS71