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How Meta advertising works
Meta advertising runs on systems most advertisers never see: an auction for every impression, a retrieval engine that picks which ads compete, and metrics that are easy to misread. These are plain explanations of how each part works, with the sources behind them.
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How Meta decides who sees your ad
Every time someone scrolls Facebook or Instagram and there is space for an ad, Meta has to choose one ad out of millions. It does this in stages. A retrieval system called Andromeda narrows the candidates to a few thousand, ranking models predict how each would perform for that person, and an auction picks the ad with the highest total value.
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How does the Meta ad auction work?
Every ad impression on Facebook and Instagram goes to the ad with the highest total value, and the bid is only one part of that number.
7 min read
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Campaign structure
How campaigns, ad sets and Advantage+ automation fit together, and how the learning phase works.
Ad creative
What a static ad is, and why Meta favours ads that are genuinely different from each other.
Creative testing
How Meta's tests split people and budget, and how to tell a real winner from noise.
Metrics and attribution
What each Ads Manager number measures and how Meta decides which sales an ad gets credit for.
Creative fatigue
Why ads wear out, how Meta flags it and what frequency tells you about repetition.
Ad research
What the Meta Ad Library shows, what it hides, and what you may take from a competitor's ad.
AI ad creative
How AI ad generators work, where they fail, and what Meta requires of AI-made ads.
Look up a term
The glossary defines 32 Meta advertising terms in a paragraph each, from ROAS to Andromeda.
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Do it step by step
The guides turn these explanations into steps: making the ad, testing it, reading the results.
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Run the numbers
Free calculators and checkers for ROAS, CPA, budgets, test results, ad sizes and safe zones. No sign-up.
Browse the free tools