This edition of WebAgency’s search and social media roundup includes stories on Google’s new “Donate” button, Facebook’s self-serve mass-messaging interface for businesses and more.

• Google’s New “Donate” Button Could Be a Boon for Nonprofits (Search Engine Journal)
• Facebook Prototypes Messenger Broadcast for Businesses (TechCrunch)
• Google Trends Now Surfaces Data from News, Images, YouTube and Shopping Verticals (TechCrunch)