Why do I need to verify information when I join a group?

It means that the people who build the group have settings. If there is no setting, they can enter without verification. The setting is also for people who have nothing to do, because many of them are peer discussion organizations. Irrelevant, just diving in did not bring any overflow to the group, and the number of people also increased. Generally, there is a prescribed number of people in the group, so there will be many, depending on whether you really study the same industry.