This week’s headlines: Facebook Launches New Ad Unit Called Collections, Facebook Clones Snapchat Stories in Core App, Twitter Adds Pre-Roll to Periscope and Pinterest Launches Small Business Program.

The week’s news quick hits: Twitter Considering Paid Subscription Offering, Google Launching Header Bidding Alternative, Facebook Messenger Unveils Live Locations, Facebook Testing Pages Interactions on Groups, Pinterest Visual Search Powers New Samsung Products and Twitter No Longer Counts Replies in Character Limit.