Not all modifications need to be for local site needs. Ansible users will often identify an enhancement that could be made to the project that others would benefit from. These enhancements can be contributed back to the Ansible project. Contribution could be in the form of updates to an existing module or core Ansible code, updates to documentation, new modules or plugins, or simply testing proposed contributions from other community members.
The Ansible project uses GitHub (https://github.com) to manage code repositories, issues, and other project aspects. The Ansible organization (https://github.com/ansible) is where the code repositories can be found. The main repository is the ansible repository (https://github.com/ansible/ansible), where the core Ansible code, the modules, and the documentation can be found. This is the repository that should be cloned in order to develop a contribution.