Complex sentence: An impostor (also spelled imposter) is a person who pretends to be somebody else, often through means of disguise, often to try to gain financial or social advantages through social engineering, but also often for purposes of espionage or law enforcement.
Split into simpler sentences: An impostor (also spelled imposter) is a person who pretends to be somebody else, often through means of disguise. The objective is usually to try to gain financial or social advantages through social engineering, but also often for purposes of espionage or law enforcement.