Public Ad Libraries
How to Use the Meta Ad Library for Competitor Research
A source-first workflow for finding public Meta ads, recording evidence, spotting patterns, and avoiding unsupported performance conclusions.
Topic hub
Public Ad Libraries
Practical agency guides to Meta and Google public ad sources, reproducible search methods, evidence quality, and important limitations.
Direct answer
What this topic helps an agency decide
Public ad libraries are transparency and discovery sources that show selected information about ads a platform makes publicly available. They are useful for verifying advertiser identity, visible creative, copy, formats, and public activity context. Coverage and fields differ by platform. These libraries do not provide a competitor’s complete targeting, spend, conversion rate, attribution, incrementality, or profit.
Original decision aid
The public-source reliability check
Run this check before using a public ad record in a client recommendation or research report.
Stage
Agency action
Useful output
Provenance
Identify the official library, advertiser entity, country, filters, and access date.
A traceable source record
Coverage
Note which platforms, formats, dates, and fields the source actually exposes.
A disclosed collection boundary
Observation
Preserve the visible copy, creative, activity context, and source link.
Evidence another reviewer can inspect
Limitation
List the private performance fields the source cannot provide.
A claim boundary for the final brief
Curated reading path
Start with these guides
Ad Intelligence
Multi-Platform Ad Intelligence Across Meta and Google
How agencies can compare public Meta and Google ad evidence without flattening two different advertising contexts into one score.
Competitor Research
Best Facebook Ad Spy Tools for Agency Research in 2026
A transparent comparison of public libraries and paid research workspaces, scored for source coverage, evidence quality, organization, collaboration, and cost clarity.
Common questions
Questions agencies ask about public ad libraries
Which public ad libraries does Advertisng currently support?
Advertisng currently supports research across public Meta and Google ad sources. It does not currently claim TikTok, LinkedIn, Pinterest, Snapchat, or private competitor performance-data coverage.
Can public ad libraries show a competitor’s ad spend or conversions?
Not for ordinary commercial competitor ads in a way that proves campaign performance. Available transparency fields vary, but a visible ad record does not establish spend, conversions, profit, targeting, attribution, or causal lift.
How should agencies compare records from Meta and Google?
Record the source and date, compare only fields that both sources actually expose, disclose coverage differences, and avoid combining unlike activity fields into one unsupported performance score.
Continue the workflow
Related research topics
Competitor Ad Research
Evidence-led agency workflows for studying public Meta and Google ads, documenting observable patterns, and turning them into testable hypotheses.
Research-to-Brief Workflows
Agency methods for converting public-ad observations into original creative hypotheses, production-ready briefs, and measurable client tests.
Advertising Platform Decisions
Agency decision frameworks for choosing advertising and research surfaces from customer intent, creative fit, measurement readiness, and evidence.