What is a media pack, and what do circulation figures actually mean?
A media pack is the document a publisher gives advertisers describing its audience, reach and advertising options — and the numbers in it are audited in some cases and self-declared in others, which is the distinction worth knowing.
What a media pack contains: audience size and composition, demographics, advertising formats and specifications, rate card prices, and case studies.
Circulation versus readership, which are different and routinely conflated:
Circulation — copies distributed. Audited in the UK by ABC, which verifies figures against publishers' records.
Readership — how many people actually read a copy, which is higher because copies are shared. Estimated by survey rather than counted, in the UK through industry research covering print and digital audiences.
The important subdivisions of circulation:
Paid-for versus free distribution.
Bulk and multiple copies — copies supplied in quantity to hotels, airlines and similar, frequently at nominal cost. These count toward circulation and represent a very different level of engagement from a purchased copy, and their proportion is disclosed in audited figures precisely because it matters.
Subscription versus newsstand, where subscribers are generally more valuable.
The digital equivalents, and their problems. Online audience figures are measured by unique users, page views and sessions, and they are far less comparable than print circulation:
Unique users are counted per device and per browser, so one person is frequently several.
Definitions differ between measurement providers.
Bot traffic inflates figures unless filtered rigorously.
Referral-driven traffic from social platforms has little relationship to loyalty, so two sites with identical traffic can have entirely different audiences.
Why it matters beyond advertising. Circulation and audience figures are used as a proxy for influence — in political reporting, in regulatory questions about media plurality, and in arguments about ownership concentration. Declining print circulation with growing digital audience is the pattern almost everywhere, and the two are not equivalent in revenue terms, which is the underlying economic problem for the industry.
Some publishers have withdrawn from public auditing, which makes comparison harder.