Light contact is part of the fluency shaping and stutter modification strategies, Take a look at the PDF documents right [here](https://nicespeechlady.com/wp-content/uploads/2018/04/HANDOUT-ABLE-Summary-of-Stuttering-ModificationFluency-Enhancing-Techniques.pdf) and also over [here](https://ssgpd.com/wp-content/uploads/2022/05/6-Stuttering-Modification-Strategies.pdf). After having read these stutter strategies, you can watch a few videos on YT where a speech therapist explains it better.