[[["เข้าใจง่าย","easyToUnderstand","thumb-up"],["แก้ปัญหาของฉันได้","solvedMyProblem","thumb-up"],["อื่นๆ","otherUp","thumb-up"]],[["ไม่มีข้อมูลที่ฉันต้องการ","missingTheInformationINeed","thumb-down"],["ซับซ้อนเกินไป/มีหลายขั้นตอนมากเกินไป","tooComplicatedTooManySteps","thumb-down"],["ล้าสมัย","outOfDate","thumb-down"],["ปัญหาเกี่ยวกับการแปล","translationIssue","thumb-down"],["ตัวอย่าง/ปัญหาเกี่ยวกับโค้ด","samplesCodeIssue","thumb-down"],["อื่นๆ","otherDown","thumb-down"]],[],[[["\u003cp\u003eGoogle's AI-based system, SpamBrain, significantly reduced spam in search results in 2021, identifying nearly six times more spam sites than in 2020.\u003c/p\u003e\n"],["\u003cp\u003eGoogle launched updates to combat link spam, scams, and online harassment, resulting in a 40% reduction in scammy results and improved protection for users.\u003c/p\u003e\n"],["\u003cp\u003eEfforts were made to improve the ranking of product review queries by reducing low-quality reviews and promoting genuine, hands-on reviews with expertise.\u003c/p\u003e\n"],["\u003cp\u003eGoogle is actively working to reduce manipulative behaviors that degrade user experience, even if they don't directly violate quality guidelines.\u003c/p\u003e\n"],["\u003cp\u003eUsers are encouraged to provide feedback on manipulative behaviors encountered in search results to help Google further enhance search quality.\u003c/p\u003e\n"]]],["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"],null,["# How we fought Search spam on Google in 2021\n\nThursday, April 21, 2022\n\n\nIn 2021, the world searched for [how to heal and how to come back stronger](https://blog.google/products/search/year-in-search-2021/). To help people find helpful information on questions big and small, we worked to keep spam and malicious content away from Search.\n\nSpamBrain: our most effective solution against spam\n---------------------------------------------------\n\n\nWe caught 200 times more spam sites in 2021 compared to when we first started nearly two decades ago, thanks, in part, to our AI-based spam-prevention system called SpamBrain.\n\n\nSpamBrain was launched [in 2018](/search/blog/2020/06/how-we-fought-search-spam-on-google#spam-trends) and we've been continuously improving its performance. In 2021, SpamBrain identified nearly six times more spam sites than in 2020. This resulted in a major reduction in hacked spam (70%), which was a spam type commonly observed in 2020, and gibberish spam on hosting platforms (75%). Another notable feature of SpamBrain is that it was built to be a robust and evolving platform to address all types of abuse.\n\n\nWith an increasing volume of sophisticated spam being produced every day, SpamBrain's ability to identify disruptive and malicious behaviors among billions of web pages has allowed us to keep more than 99% of searches spam-free.\n\nProtecting search quality and user safety\n-----------------------------------------\n\n\nWe made significant progress in several areas beyond traditional web spam in 2021: most notably in fighting link spam, scams, and online harassment.\n\n\nLinks still help us discover and rank results in meaningful ways, and we made a lot of progress in 2021 to protect this core signal. We launched a [link spam update](/search/blog/2021/07/link-tagging-and-link-spam-update) to broadly identify unnatural links and prevent them from affecting search quality.\n\n\nScams are a [big threat to online user safety](https://www.ftc.gov/news-events/news/press-releases/2022/02/new-data-shows-ftc-received-28-million-fraud-reports-consumers-2021-0). Expanding on [our work in 2020](/search/blog/2021/04/how-we-fought-search-spam-2020#protecting-you-beyond-spam), we launched several algorithm updates that resulted in a 40% reduction of scammy results. The improvement in coverage allowed us to protect people against many more scam types beyond the customer support queries that we've been fighting for the past few years.\n\n\nTo protect user safety, we extended SpamBrain to [address online harassment](https://blog.google/products/search/improving-search-better-protect-people-harassment/) and, for name queries, reduce the prominence of sites with exploitative removal practices.\n\nReducing the effects of ranking manipulation\n--------------------------------------------\n\n\nBesides spam, we also work hard to reduce low quality content and ranking manipulations by fighting behaviors that attempt to narrowly avoid violating [our quality guidelines](/search/docs/advanced/guidelines/overview), but are still manipulative in nature and degrade the user experience.\n\n\nFor example, one aspect of this initiative was to improve the ranking of product review queries, where content often consisted of rewritten product descriptions, and not genuine, hands-on reviews. We made two substantial updates to [how we evaluate product reviews](/search/blog/2021/12/product-reviews-update-and-your-site) in 2021 that resulted in significant reduction in low quality reviews, while promoting ones with better content and expertise.\n\n\nWe want to make sure there's nothing getting in the way of people finding the most useful content through Search. If you see manipulative behaviors in search results, you can [send us feedback](https://support.google.com/websearch/answer/3338405) right on the search results page.\n\nPosted by Cody Kwok, Principal Engineer"]]
