In the epoch of big data and the ubiquity of mobile internet, the sanctity of personal privacy on social media platforms is increasingly imperiled. As communicative exchanges on these platforms become nearly instantaneous and pervasively ubiquitous, the demarcation between corporeal experiences and digital interactions becomes increasingly nebulous, thereby augmenting the intricacy of privacy conundrums. The digital transmutation and incessant circulation of personal datum, magnified by avant-garde big data technologies, intensify the vulnerabilities surrounding user confidentiality. Concurrently, societal conceptualizations of privacy undergo a paradigmatic shift, compelling a recalibration between the imperatives of privacy preservation and the exigencies of personal information exploitation. This investigation offers a perspicacious dissection of the historical trajectory of privacy, elucidates the manifold challenges engendered by the disclosure propensities of social media aficionados, and delineates prospective regulatory paradigms. The overarching aspiration is to promulgate efficacious stratagems for safeguarding personal privacy on social media amidst the contemporary digital renaissance.