You will get verified on BrightID based on your social relationships and the communities you belong to. These are presented to BrightID with your connections and the groups you create or join.
There are different levels of verification on BrightID. The first level of verification can be achieved by joining a verification party and following the instructions that are provided by the hosts. But that is only the beginning. Some apps might require you to have higher verification levels which can only be achieved by making connections with your friends and creating groups with them.
You can access a list of achievements to earn in the BrightID app menu. Following the list of achievements will help you reach higher levels of verification.