Online social networking services for providing an online social networking platform that enables users to create personal profiles with customizable privacy settings, connect with friends and contacts, discover and manage interpersonal relationships, and share personal preferences and interests with others in their network; and providing tiered privacy controls enabling users to designate contacts into permission-based relationship groups with varying levels of access to personal information; Online social networking services for providing digital identity sharing services, namely, enabling users to generate and share personal QR codes linked to their social networking profiles for exchanging contact information and personal details when meeting in person; providing friend and contact discovery services within a social networking platform based on mutual connections, shared contacts, and relationship proximity; and maintaining a social identity graph that maps and tracks interpersonal connections between users; Online social networking services for providing personalized recommendations to users within a social networking platform based on algorithmically determined preferences, interests, and gifting histories of their contacts; enabling users to share their personal preferences, wishlists, and interests through their social networking profiles to facilitate receiving personalized gifts and communications from contacts; and providing interactive content for users to curate and express personal preferences within their profiles; Online social networking services for enabling groups of users to organize, coordinate, and collaborate on shared interpersonal events and celebrations, namely, birthdays, graduations, retirements, and other milestone occasions; facilitating group communications and coordination among users within a social networking platform for the purpose of planning and contributing to collective gifts and shared expressions of support for designated recipients within the network