Here is what Data Loss Prevention refers to

For those who are unfamiliar, Data loss prevention (or DLP) refers to the strategy that ensures end-users do not exchange or send critical data outside their corporate stronghold.

Term Data loss prevention (or DLP) is also used to illustrate software products that empowers network administrators to put a check on what sensitive data end-users can exchange or transfer.

These software products apply business precept to categorize and safeguard confidential and sensitive data so that unaccredited end-users cannot share information as such revelation could put a company at risk.