An 'organization' is a required to create projects. It's essentially the collaborative account where you and other team members can create projects. You can be a team member of multiple organizations.
The record of your research
Creating an organization helps you centralize your organization's recruits. All recruitment projects live under the organization, and billing goes through a central organization account. It also means that you can learn and grow from a complete record of your past studies.
There are two permission types in an Organization: Owner, and Member.
Owner - Any owner of an organization may edit that organization's settings, from profile details to billing information.
Member - A member can view and edit projects, but cannot edit billing or organization settings.