The onslaught of privacy regulations has impacted every industry and, while it seems that no industry can be flat footed – from auto manufacturers to ecommerce platforms – one in particular has had to remain especially nimble: the advertising technology industry. In this guest article, Reed Smith attorneys Sarah Bruno and Casey Perrino discuss the growth of adtech and how it falls into privacy laws’ crosshairs, review relevant definitions under the CCPA and provide advice on how the industry can comply with the patchwork of sometimes elusive definitions. See also “Key Compliance Considerations for Fund Managers Using Alternative Data” (Jan. 15, 2020).