Complex sentence: Samaritans Radar was a Twitter-based service created by the digital advertising agency Jam for the British suicide prevention charity Samaritans as a way to inform users when their Twitter contacts are potentially in need of emotional support.
Split into simpler sentences: Samaritans Radar was a Twitter-based service created by the digital advertising agency Jam for the British emotional support charity Samaritans. It was intended as a way to inform users when their Twitter contacts were potentially in need of emotional support.