Sampling in trap music refers to taking a portion or sample of a sound recording, such as a drum beat or a melody, and incorporating it into a new composition.  This can be done using a digital audio workstation (DAW) or a sampler, a device or software that allows you to record, manipulate and play back samples.  Sampling is a common technique used in many genres of music, particularly Trap, Hip-hop, electronic, and dance music. It allows producers to use existing sounds and recordings in their music, creating new compositions and remixes.