What is paid media?

Paid is the most controllable and most measurable of the media layers: you choose the message, the audience, and the flight dates, and you get delivery numbers back. It is also where the concept of share of voice originated, as a brand’s slice of category ad spend, decades before the term migrated to organic conversation.

Planning and measurement run on impressions, reach and frequency, cost per outcome, and increasingly on incrementality tests rather than last-click attribution. The structural change of the past several years is transparency: Meta’s Ad Library and Google’s Ads Transparency Center made competitor creative publicly inspectable, so any strategist can now see what a rival is running, in what formats, and for how long, even though spend figures remain mostly hidden outside political advertising.

The classic pitfall is optimizing efficiency at the expense of effectiveness: chasing cheap clicks starves the brand-building work that makes future clicks cheap. A second is category accounting, since boosted posts and paid creators blur the paid, earned, and owned lines, and budget lines routinely undercount true paid presence. Honest reporting labels what was bought.

How this shows up in Waldo

Because ad libraries are public records, Waldo reads them daily for tracked brands and files the paid layer next to earned and owned. /brands/{id}/ads/active returns what a brand is running right now, ?since= narrows it to what changed, and a campaign that gets pulled stays in the record.

Related terms and reading