Technologies like video analyzers and Wi-Fi trackers could find increased usage in stores
Harmful political speech played a big role in the uptick
Facebook could be going after TV advertising with the format, one analyst said
The meeting follows waves of disclosures related to government surveillance
Access has been restored to almost everyone, the CEO said
Instagram Direct could help some brands boost their engagement
Twitter said the new capabilities won't increase the number of ads users see in their feeds
Some users have been unable to access Yahoo Mail for multiple days
Head of News Vivian Schiller reveals some of the thinking behind Twitter's news ambitions
Security and flexibility are among several big challenges, experts said
