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Case: Optimizing Advertising Campaigns for Corestone Before: Advertising campaigns yielded poor results, conversion - 0.02%. High advertising costs - up to 1,977,221 rub. The cost per conversion reached 3,600 rub. High bounce rate - 60.19%. Loss of applications due to incorrect changes in campaigns. after: Increase in conversions of 233% in two months. Reduced cost per conversion by 57.84%. Budget savings of 23,996 rub. due to the reduction of failures. Recovering bids and improving campaign performance.