Facebook did a *terrible* job at this, with huge slices of its political ads never landing in its transparency portal. We know this because independent researchers at NYU's engineering school built an independent, crowdsourced tracker called #AdObserver, which scraped all the ads volunteers saw and uploaded them to a portal called #AdObservatory.

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Interesting read on automatically identifying the topics of political ads! #adobservatory #c4d #nlp https://medium.com/cybersecurity-for-democracy/lab-notebook-improving-topic-modeling-for-digital-political-ads-15e5adf5d6a

Lab notebook: we're working on better ways to automatically find topics in digital political ads. Austin Botelho explains how. #adobservatory #nlp #politicalads #machinelearning https://medium.com/cybersecurity-for-democracy/lab-notebook-improving-topic-modeling-for-digital-political-ads-15e5adf5d6a