Personas: On hello, your interests are defined by personas. Personas shape your hello experience: your content, friends, and potential friends. (What interests you most?)
Communities: Communities are interest-groups, created with personas by people like you. Discover and join communities in your personas that inspire you! You can join any community you please, even outside your 5 chosen personas!
(Pick your personas. Join or create communities that are tagged with your chosen personas).
You can tag up to two relevant personas for a community. Jots tagged with a community are distributed the same way a jot tagged with those personas would be, but is also distributed to all of the community members.