The 2021 mail.com data security survey, conducted by YouGov with 1,326 U.S. respondents aged 18+, reveals major concerns regarding personal data security, particularly related to hacker attacks, online shopping fraud, and theft. Common protective measures include using secure passwords, two-factor authentication, and regular backups, though many Americans do not actively safeguard their digital data. The survey also highlights people's perceptions of spam emails, with most recognizing them as annoying and a potential security risk.