[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[],["In 2021, Google's SpamBrain, an AI-based system, significantly improved spam detection, identifying six times more spam sites than in 2020, leading to a 70% decrease in hacked spam and a 75% reduction in gibberish spam. Google also launched a link spam update, reduced scammy results by 40%, and expanded SpamBrain to combat online harassment. They refined product review ranking to promote genuine expertise, and reduced low quality content. They encourage users to send feedback on manipulative search results.\n"]]