49 sellers tracked, across 15 markets.
Search advertising places a sponsored result or product listing above or beside the organic results, sold by the search platform's own auction — Google, Bing, Amazon and marketplace search among them. It is priced per click (CPC) in almost every case, occasionally per action or per sale for a retail search placement, and bought self-serve through the platform's own ad account rather than negotiated.
Ranked by Tranco — the site's own global traffic rank, not a payment.
Read off the 59 ad spots on this channel with a recorded buying method — not every seller here has one yet.
Read off every rate card recorded for this channel, whether or not the number itself was published.
No published rate has been read for this channel yet — that is a gap in what has been checked, not evidence that nobody sells it.
Mostly — the major search platforms run an open, self-serve auction. A managed or agency account exists for scale, not because the door is closed to a direct buyer.
Because the outcome the advertiser actually wants — a click to their page — is what's measured and charged for; showing the ad with no click costs nothing, which is the main reason search auctions clear at CPCs well above a typical display CPM.
Not on the major platforms — position is decided by the auction for every query, not sold as a guaranteed slot. A retail marketplace's sponsored placement works the same way.