Characterizing Brazilian Political Ads on Facebook

Cora Silberschneider, Samuel S. Guimarães, Fabrício Benevenuto, Márcio Silva
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Abstract

Most of politicians, public figures and political candidates use online advertising platforms to spread their political values and messages. Since 2018, Facebook has made available an Ad Library providing advertising transparency to prevent interference in elections and other political issues. However, it is not explicit how the ads are selected to incorporate this database and to what extent there is an artificial intelligence applied to this selection. In this work, we provide a categorization of the ads data in Brazil to understand the dynamic of political advertisements and what type of ads are present in this ad library. We analyze impressions, the money spent and who are the advertisers on ads from 2018 to 2021. Among our findings, we show that during the election months of 2018 and 2020 the volume of ads correspond to approximately 30% of the ads in the dataset and the moving average of the money spent per ads increases about 200% after the first round of brazilian elections.
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Facebook上巴西政治广告的特征
大多数政治家、公众人物和政治候选人使用网络广告平台来传播他们的政治价值观和信息。自2018年以来,脸书提供了一个广告库,提供广告透明度,以防止干预选举和其他政治问题。然而,目前还不清楚如何选择广告以纳入该数据库,以及人工智能在多大程度上应用于这种选择。在这项工作中,我们对巴西的广告数据进行了分类,以了解政治广告的动态以及该广告库中存在的广告类型。我们分析了从2018年到2021年的广告印象、花费的钱以及谁是广告客户。在我们的研究结果中,我们表明,在2018年和2020年的选举月份,广告的数量相当于数据集中约30%的广告,而在巴西第一轮选举后,每个广告花费的移动平均值增加了约200%。
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