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A 2.4% Lift in Real Time
In a recent engineering post, Meta disclosed that its Andromeda retrieval engine has lifted Facebook ad conversions by 2.4% since 2025. The figure appears in a follow‑up guide published on October 28, 2026, reinforcing the same percentage as the impact metric. For an ecosystem that moves billions of ads each day, a few percentage points can translate into millions of additional purchases.
How Andromeda Reshapes the Retrieval Stage
Andromeda sits at the front of the ad delivery pipeline, acting as the first filter that narrows a massive pool of eligible ads down to a handful of strong candidates within milliseconds. It scores every ad with near‑ranking‑level accuracy, a level of precision previously reserved for later, more compute‑intensive stages. The result is a candidate set that reflects a broader, more diverse mix of creatives, because the system can evaluate a larger universe without sacrificing latency.
The Hardware and Scale Behind the Numbers
The 2024 launch of Andromeda ran on the NVIDIA GH200 Grace Hopper Superchip, a GPU designed for massive parallel inference workloads. Since then, the architecture has been re‑engineered to run the entire retrieval pipeline on a single GPU server while still processing over one billion ads per second. Meta claims this throughput represents a 100‑fold lift over the 2024 version of the system. Such scale lets the model consider a candidate pool that is orders of magnitude larger than before.
What Advertisers Are Being Asked to Do
Meta’s own guidance advises advertisers to feed the system more distinct creative assets, give the algorithm room to match ads to buyers, and provide clean conversion signals. The recommendation stems from the observation that a larger, cleaner creative inventory enables Andromeda to surface higher‑performing ads across its expanded pool. Clean conversion data, in turn, helps the model learn which matches truly drive sales, reinforcing the 2.4% lift reported.
The New Creative Playbook
The practical upshot for marketers is a shift from chasing a single perfect ad to cultivating a diverse library of variations. Because Andromeda evaluates billions of ads in real time, each distinct creative has a chance to be paired with the right user. Advertisers who limit themselves to a narrow set risk being overlooked by the retrieval engine. By expanding creative breadth and ensuring accurate conversion reporting, brands can tap into the modest but measurable uplift that Andromeda delivers.
Sources
- Meta Andromeda: Powering the Next Generation of Ads Retrieval Through Model-System Co-Design - Engineering at Meta — “Since 2025, Meta Andromeda has delivered a 2.4% increase in conversions on Facebook.”
- Meta Andromeda Update: What Advertisers Should Do Now — “Meta also says Andromeda has delivered a 2.4% increase in conversions on Facebook since 2025.”
- 2024, December 19: See Andromeda Galaxy - When the Curves Line Up — “Hubble was convinced to announce this distance at an astronomy conference that began on December 30, 1924.”
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