Facebook's next privacy challenge

The reliance on personal information is a potential weakness. The GDPR limits how companies can use individuals' data, leading Facebook to let users opt out of some types of targeted advertising

Facebook Inc’s FB — 0.54 per cent advertisers in Europe are on the front lines of its efforts to tighten privacy practices, and their frustrations help explain why the social-media giant’s troubles are far from over.
 
Facebook said Europe’s new privacy law — General Data Protection Regulation, or GDPR — contributed to slowing revenue growth in its quarterly earnings report on Wednesday, which sent its shares plunging nearly 20 per cent over Thursday and Friday. Some advertisers say another looming privacy change at the Silicon Valley giant could amplify that effect.
 
Under pressure from the GDPR and the