Is the circle of idle fish equivalent to a fish pond?

In the past, idle fish was called a fish pond when it was not revised, but now it has been changed into a circle, that is, the content of idle fish you like is added to the idle fish, so that people who like this kind of things can communicate with each other in a circle, and some people can post idle fish here, which is convenient for people in need to buy and communicate conveniently.