You will have to register your contacts in your personal Tsunami Cloud Customer Manager (CCM). Those contacts can be organized in different groups according to their preferences. Tsunami will automatically invite them to create an account on your platform, and invite their friends to do so. When their friends Join your community you have their emails, phones and Tsunami will use a set of complex calculations to determine what are their preferences to put them in the right group of contacts. At the end you get a powerful, well qualified customer base that are used for an efficient targeted marketing. Note that, Tsunami has better view over customer who creates an account on your platform, rather than contacts you save manually. So always invite people to create account.