SampleDelay is a plugin that simply applies a short delay to a track. It has a precision at the level of one sample. It is more designed to be used as a utility than to be used to make an effect.
Examples of use
Shifting a track slightly: the plugin can be used to adjust a track that has been accidentally slightly shifted.
Dubbing effect: with the plugin, two tracks can be slightly shifted from one to the other to get a dubbing effect.