As the name implies, DLP is about preventing loss or misuse of data. By various means, including content discovery and analysis, it helps preclude end users from accidentally or maliciously sharing sensitive, critical, and confidential data that might put a business at risk.
For instance, DLP enables administrators to set up policies (from a library of predefined content selectors) or, even, create custom rules to check outgoing emails (including attachments). If anything appears amiss, DLP can either quarantine emails for review, request users to modify data, or block emails and notify senders.
