Google Search Central post, the company credited SpamBrain with helping it make more than 99% of searches spam-free.

Source: https://www.forbes.com/sites/forbesagencycouncil/2023/02/02/spambrain-how-google-keeps-spam-out-of-search-results-and-what-it-means-for-seo/

Such as when the December 2022 link spam update rolled out, which was an update to SpamBrain to detect and neutralize spammy links.

Source: https://searchengineland.com/google-webspam-report-says-spambrain-caught-five-times-more-spam-this-year-395493