{{ title }} is a domain name registration service for I2P. Hostnames in I2P aren't globally unique. {{ title }} doesn't act as "central authority", it only provides a way to publish hosts to provide an easy means of access for them. You can read more about how - I2P naming works in official docs + I2P naming works in official + docs.
{{ title }} also provides a jump service. For accessing hosts through it, use urls like - http://{{ domain }}{% url pyi2phosts.jump.views.jumper 'example.i2p' %} + http://{{ domain }}{% url pyi2phosts.jump.views.jumper + 'example.i2p' %}.
If you are running an eepsite or another service and want a human-readable domain name - for them, consider to registering it + for them, consider to registering it. {% endblock %}