Paid media basics
Ad auction
The automatic process that decides which ads appear for each search or page view, and what each advertiser pays.
What it is
Each time there is space for an ad, the platform runs an auction among eligible ads. Bids matter, but so do the ad's expected relevance and quality.
Why it matters
For lead generation and e-commerceIt explains why a better ad can win cheaper placements, and why prices move with competition.
In practice
Advertisers influence it through bids or bid strategies, ad quality and targeting; they do not see the auction itself.
A common mistake
Assuming the highest bid wins. A weak ad can pay more and still show less often.