Definition
An insertion order (IO) is the contract that records the specifics of a bought advertising or media placement: the parties, the flight dates, the inventory or placement, the pricing model and rate, the total budget or volume commitment, targeting, creative specs, tracking and reporting arrangements, and the terms for cancellation, make-goods and payment. It turns a negotiated media buy into a signed, referenceable document that both sides work to.
IOs are standard for direct deals — buying a fixed placement from a publisher, a sponsorship, a newsletter slot, a tenancy on an affiliate site — as opposed to self-serve auction buying, where the platform's terms of service govern instead. A clear IO prevents the common disputes: what exactly was bought, at what price, for how long, measured how, and what happens if delivery or payment falls short.
In context
In iGaming, IOs appear wherever media is bought directly rather than through an auction: an operator taking a fixed-position tenancy or a sponsored review slot on an affiliate's site; an affiliate or operator buying a placement in a Telegram channel, a newsletter, a podcast or a sports-content site; a brand sponsoring an event or a stream. Because gambling advertising is regulated, the IO usually carries extra clauses: the markets the placement may run in, required responsible-gambling messaging and age-gating, prohibited content and targeting, licensing warranties, and the right to pull the placement immediately on a compliance problem.
For an affiliate selling placements, a proper IO protects the relationship and the site: it fixes the scope (one link, in one section, for one period — not open-ended promotion), the price and payment terms, and the editorial boundary (a paid placement is labelled and does not dictate the surrounding editorial rankings). For a buyer, it fixes delivery (position, duration, any impression or click expectations) and the remedy if the publisher underdelivers.
Keeping paid placements on documented IOs, with clear labelling and compliance terms, is also what lets an affiliate show an operator or a regulator exactly what commercial arrangements exist and on what terms.
Worked example
An operator signs an IO with an affiliate for a three-month sponsored position in the casino-reviews section: fixed monthly fee, labelled "Sponsored", UK traffic only, mandatory responsible-gambling footer, no influence on the editorial ranking, and immediate takedown rights if a compliance issue arises. Both sides have a single document to point to if anything is disputed.
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