Google has issued a critical security alert for its 2.5 billion Gmail users following a data breach involving a Salesforce database, which, while not compromising passwords, has led to an increase in phishing attacks. Hackers are exploiting exposed business contact information to craft convincing phishing emails and calls, raising concerns about account security. Google advises users to update passwords, enable multi-factor authentication, and utilize its Advanced Protection Program to mitigate risks. The warning underscores the importance of user vigilance in recognizing phishing attempts and maintaining up-to-date security measures to safeguard accounts against sophisticated cyber threats.