TY JOUR TI ALTERNATIVE STRATEGIES FOR TARGETING AND MEASURING CAMPAIGN EFFECTIVENESS IN THE AGE OF COOKIELESS MARKETING KW cookiless marketing KW alternative targeting strategies KW first-party data KW contextual advertising KW clean data rooms KW consent management systems KW CDP KW Privacy Sandbox KW user identification KW digital privacy KW campaign effectiveness measurement JO MOSCOW ECONOMIC JOURNAL AU Ena, A.N. PY 2025 IS 10 PB Electronic science