Signal chain – is a combination of effects between the output of your guitar and the output of your amp. Every effect is designed to alter tone characteristics: frequencies, phase, dynamics and time. The order of effects does matter. Any order / combination of effects is possible – there is no “right” combination – any “right” combination it the tone you are satisfied with.
Nevertheless there are some classic effects sequences that will work fine in most situations.
Ambient music is a “genre of music that puts an emphasis on tone and atmosphere over traditional musical structure or rhythm” .
Drone – is “a minimal music genre that emphasizes the use of sustained or repeated sounds, notes, or tone-clusters” .
Soundscape is a term that “was first described by Canadian composer and environmentalist, R. Murray Schafer”  within the framework of Acoustic ecology.
Frippertronics – is the name given by Robert Fripp to his analog delay (looping) system consisting of two side-by-side reel-to-reel tape recorders.