The goal of strangulation is that UKE gives up:
There are also nerve strangulation, which complement the normal strangulations. But these are not allowed within the judo competition.
UKE shows his abandonment by knocking one or more times at his opponent or the mat. In extreme cases, he can also illustrate this with the help of his heel or other body parts. (In Japan, he can also say: "Moito" - "I am defeated.")