A welcoming and positive community attracts new members to join and creates a healthy and supportive environment for all the members.
Think about how you might like to welcome new members. An individual welcome from a community admin or group admin can be very encouraging. You should also include information on the community's purpose and rules to help them to navigate, feel comfortable, and participate confidently.
As more members join, your community and group admins can also help build engagement by connecting individuals with similar interests to each other. At some point, these newly connected members may want to form another group within your community.
How to create and invite into a group