Originally published December 2009 on Facebook's privacy-settings rollout. Rebuilt June 2026 as EPR's reference on the seventeen-year evolution of platform privacy — from Facebook's first default-public moment to the AI training-data fights of 2026.
Twitter became the real-time influence layer of the internet — where breaking news lands first, where founders move markets, where political reputations are made and ended. Elon Musk's $44B acquisition reset the economics. The function persists. The canonical EPR Twitter/X hub on the Platform Authority Graph.
Yesterday we classified the best of the best in the following categories: News (General), Business and Finance, PR News, PR Blogs and Social Media. Today we'll focus on: PR Corporate Sites, PR Newsletters, PR distribution, PR Software and Communication miscellaneous.
Ogilvy Public Relations is the global PR practice of Ogilvy, the WPP-owned creative network founded by David Ogilvy in 1948. Led globally by Julianna Richter since 2020, Ogilvy PR operates as one of five business units inside a network spanning 120+ offices in 90+ countries.
EPR's canonical map of the PR industry — the global holdcos (Omnicom-IPG, WPP, Publicis, Dentsu, Havas), the leading independents (Edelman, 5W AI Communications, Finn Partners, Zeno, APCO, Brunswick, Sard, Joele Frank, Kekst CNC, Prosek), the category specialists, and the trade press that covers them all.
Social media marketing matured into a real channel. The 2009 Businessweek snake oil warning was right — and the same dynamic now defines AI Communications.
The FTC has updated its guidelines for marketing testimonials, affecting bloggers and celebrity endorsers. How will this affect social media?
From Groupon to Amazon Prime to TikTok Shop. The Retail Promotion Effectiveness Index — five customer acquisition mechanics ranked by long-term return on promotional dollar in 2026.
PR Couture is the canonical fashion PR community, founded by Crosby Noricks in December 2006. Publication, job board, and Insider membership for fashion publicists.
The following is an attempt to create a professional resource; a list of sites that are not only popular but also provide quality information and resources for PR professionals, journalists, business owners, and so on.