What is commotio cordis? Explaining sudden heart stoppage that 'likely' led to Damar Hamlin going into cardiac arrest

Damar Hamlin suffered cardiac arrest following a hit in the "Monday Night Football" game vs. the Bengals.

source https://www.sportingnews.com/us/nfl/news/commotio-cordis-damar-hamlin-heart-cardiac-arrest/oml0d414m0p1wqpktyal5hw6