# AdLibrary > AdLibrary is an ad intelligence and research platform that helps marketers, agencies, and e-commerce brands discover, analyze, and monitor real-world advertising campaigns across Facebook, Instagram, TikTok, YouTube, Google, LinkedIn, and Twitter/X. It provides searchable ad libraries for brands, competitive analysis tools, and free marketing calculators. AdLibrary allows users to search ads by brand, industry, platform, ad type, geography, and engagement metrics. It is designed for performance marketers, media buyers, creative strategists, and marketing agencies who need competitive ad intelligence. ## Core Pages - [Home](https://adlibrary.com/): Main landing page with product overview and search - [Features](https://adlibrary.com/features): Platform capabilities for ad discovery, analysis, validation, and monitoring - [Pricing](https://adlibrary.com/pricing): Subscription plans and pricing details - [Brands](https://adlibrary.com/brands): Browse brand ad libraries with real ads from major platforms - [Search](https://adlibrary.com/search): Search across all ads, brands, and content ## Free Tools - [Ad Spend Estimator](https://adlibrary.com/tools/ad-spend-estimator): Estimate impressions, clicks, and conversions from ad spend - [CPM Calculator](https://adlibrary.com/tools/cpm-calculator): Calculate cost per thousand impressions - [ROAS Calculator](https://adlibrary.com/tools/roas-calculator): Calculate return on ad spend - [CPC Calculator](https://adlibrary.com/tools/cpc-calculator): Calculate cost per click - [CTR Calculator](https://adlibrary.com/tools/ctr-calculator): Calculate click-through rate - [Media Mix Modeler](https://adlibrary.com/tools/media-mix-modeler): Optimize budget allocation across channels - [Ad Budget Planner](https://adlibrary.com/tools/ad-budget-planner): Plan campaign budgets ## Educational Content - [Guides](https://adlibrary.com/guides): How-to articles, best practices, and strategy guides for digital advertising - [Glossary](https://adlibrary.com/glossary): Advertising and marketing terminology definitions - [Use Cases](https://adlibrary.com/use-cases): Practical scenarios showing how to use ad intelligence ## Comparisons - [Ad Tools](https://adlibrary.com/adtools): Reviews of ad intelligence tools including AdLibrary, Foreplay, BigSpy, PowerAdSpy, and more - [Alternatives](https://adlibrary.com/alternatives): Compare alternatives to major ad tools - [Compare](https://adlibrary.com/compare): Head-to-head comparisons between ad intelligence platforms ## Optional - [Blog](https://adlibrary.com/posts): Latest news and updates about digital advertising - [Top Ads](https://adlibrary.com/top-ads): Trending and top-performing ads across platforms - [Contact](https://adlibrary.com/contact): Get in touch with the AdLibrary team