What this means for Snapchat is that it will now be able to show advertisers how ads are performing based on measurements that they are used to from other campaigns.
The startup pioneered a number of interesting features, including the ability to follow a breaking news story, but it never figured out how to make money.
Facebook says a study published in Science magazine proves that personal choice matters more than algorithms in determining what users see-but critics say it doesn't prove that at all.