F · chapter

Paid Media & Advertising

What it is: buying attention and placement across all inventory — and, increasingly, buying placement inside the AI assistants and agents that now mediate human (and agent) decisions.
The 2026 shift: automation went from option to default (Meta Advantage+ is the default for new campaigns; Google AI Max for Search is GA and keywordless), so the operator's job moves from media-buying to creative ops + measurement — and a thin, fast-moving new layer of paid placement inside AI answers/assistants has opened.
The load-bearing truth: incrementality is the arbiter. Platforms over-attribute by roughly 20–60%, so no platform-reported ROAS/CPA lift is a fact until an independent holdout/geo-test corroborates it. This is the single discipline that keeps automation honest.
Don't: pick a channel before a buying model, trust a platform lift number, treat agent-mediated paid as a footnote (or as a sure thing), or assume an "always-on AI ads everywhere" future — Perplexity exited ads while OpenAI/Google/Walmart leaned in.

How this domain is organized internally — and the decision logic, runnable workflows, and agent angle — are in the full map.