Big news week! Facebook is upgrading security technology, prioritizing more trustworthy news publishers, adding desktop posting to Stories, and encouraging people to watch videos together (virtually), as well as hitting the road to help businesses with the platform in 30 cities. Instagram Stories adds GIFs, tests text-only stories and a screenshot notification feature, and letting friends know when you were last active. Snapchat Stories are now shareable beyond the platform, and app install ads add more valuable features. Finally, WhatsApp rolls out business access.