LinkedIn at SXSW London: B2B Marketing Rules Are Changing

At SXSW London, LinkedIn's Head of Marketplace Innovation Mimi Turner presented a framework the company is calling Buyability, arguing that the B2B marketing playbook built over the past 25 years is no longer sufficient.

The premise is direct: for most of that period, growth came from outspending competitors to control what buyers saw. Paid search rewarded the biggest budgets, traffic flowed to brand-controlled environments, and pipeline optimization followed traffic metrics. Those rules still exist but they no longer guarantee advantage.

The Signals That Used to Work Are Breaking Down

The disruption is AI-driven and the data LinkedIn cites is pointed. According to 6sense's 2025 B2B Buyer Experience Report, 94% of buying groups now use ChatGPT, Gemini, Copilot, or other LLMs before they ever speak to a sales team. Organic traffic has been replaced by zero-click behavior, and the signals marketers relied on to track consideration, clicks, traffic, ranking, have become unreliable.

More significantly, LLMs construct their answers using consensus signals: peer reviews, third-party validation, mentions on external platforms, expert recommendation, and explanatory content. Keywords, paid media, and SERP position are the old world. The new world is built on what others say about a brand, not what the brand says about itself.

B2B Buying Has Always Been a Group Decision

Turner's framework mapped this to something LinkedIn argues has always been true about B2B buying: decisions are made by groups, not individuals, and those groups prioritize the ability to defend a decision over product features.

The top driver of purchase according to LinkedIn's research is whether a buyer could defend the choice if it went wrong, ahead of confidence in the product itself or buying group alignment. Negative signals from a buyer's network, colleagues who did not recommend, or peers with bad experiences, are among the most powerful deal-killers. Buyability and AI discoverability, Turner argues, share the same signal layer: customer proof, peer recommendation, expert authority, and public content that can be indexed and cited.

The New Playbook: What Others Say About You Matters More Than What You Say About Yourself

LinkedIn proposes its platform sits at the intersection of those signals, with 130 million decision-makers, 100 million verified profiles, and a brand safety score above 99%, and that it ranks as the most cited source for professional queries across leading AI platforms. 

The practical implication Turner leaves the audience with is a single question: where does your brand show up in the conversations your buyers are already having before you ever get in the room?

Mimi Turner has more to say about Buyability here on LinkedIn