This is a commonly asked question.
Translation is rendering written text from the source language into the target language.
Interpretation is rendering oral or signed information from the source language into the target language.
Interpretation can be consecutive or simultaneous.
In consecutive interpretation, the speaker says a couple of sentences and pauses for the interpreter to relay what the speaker said into another language.
Simultaneous interpretation entails an interpreter relaying the message from the source language into the target language in real-time without any pauses.
In-person simultaneous interpretation calls for interpretation equipment that is used in conferences, meetings, summits, and events.