Social Media Marketing: Foundations to Practice · Paid Social Advertising
How Paid Social Auctions Work
Paid social doesn't work like a simple bidding war where the highest bid always wins. This chapter covers the actual mechanics of the ad auction.
Paid social platforms like Meta and LinkedIn run ad auctions that do not simply award placement to the highest bidder; instead, they combine bid amount with estimated action rate (how likely the specific user is to engage with that specific ad) and ad quality to calculate a total value score, meaning a lower bid with strong predicted relevance can beat a higher bid with weak predicted relevance for the same placement.
Key Takeaways
- Paid social auctions combine bid amount, estimated action rate, and ad quality into a total value score, not just the highest bid alone.
- Genuinely well-targeted, relevant ads can achieve lower effective costs than poorly targeted ads with higher bids.
- New ads go through a learning phase with more volatile performance; frequent disruptive edits can reset this phase and prolong inefficiency.
- An underperforming ad is often a relevance and targeting problem, not simply something a higher bid alone can fix.