An invitation code is a unique code that is generated and used to invite someone to join a specific platform or team. The code is usually a combination of letters and numbers and is linked to a specific team or organization in the system. Invitation codes can be used to create a new account or to update an existing account with access to a particular team. They can be distributed via email, mail, or other means, depending on the platform. When someone enters an invitation code, they are usually directed to a personalized registration form or given access to a specific team or organization. Invitation codes can also be used to track the effectiveness of local events or measure how many users accepted an invitation and their contribution count over time.