The phrase often encourages explaining personal views or feelings in response to a situation.

Self-expression

It implies that an explanation or opinion is expected from someone, often in a challenging context.

Expectation of response

Using the phrase can suggest that someone should take responsibility for their actions through their words.

It can be a demand for someone to explain or justify a wrong action they've committed.

The phrase can seem confrontational, as if challenging someone to defend a fault or mistake.

It often implies that the person is already presumed to be in the wrong or guilty.