Djangosaml2 the use of metadata

Question

I'm manage to integrate SAML authentication in my Django application using the package Djangosaml2 and Pysaml2 with Azure as IdP provider.

everything is working properly I can login with SAML and log out.

What I don't understand is what is the use of having a metadata at the url https://panda.company.com/saml/metadata and what is the use of having a url https://panda.company.com/saml2/ls/ ? Because with just the remote_metadata.xml provided by Azure is enough to login and logout.

SAML_CONFIG = {
    'xmlsec_binary': '/usr/bin/xmlsec1',
    'name': 'CloudBolt SP',
    'entityid': 'https://panda.company.com/',
    'service': {
        'sp': {
            'want_assertions_signed': False,
            'want_response_signed': False,
            'allow_unsolicited': True,
            'endpoints': {
                'assertion_consumer_service': [
                        ('https://panda.company.com/saml2/acs/', saml2.BINDING_HTTP_POST),
                    ],
                'single_logout_service': [
                        ('https://panda.company.com/saml2/ls/', saml2.BINDING_HTTP_REDIRECT),
                ],
            },
            'required_attributes': ['email'],
        },
    },
    'debug': 1,
    'key_file': os.path.join(SAML2_DIR, 'saml.key'),  # private part
    'cert_file': os.path.join(SAML2_DIR, 'saml.crt'),  # public part
    'allow_unknown_attributes': True,
    'attribute_map_dir': os.path.join(/usr/local/lib/python3.6/site-packages/saml2/attributemaps'),
    'metadata': {
        'local': [os.path.join(SAML2_DIR, 'remote_metadata.xml')],
    },
    'contact_person': [{
        'given_name': 'First',
        'sur_name': 'Last',
        'company': 'Company',
        'email_address': '[email protected]',
        'contact_type': 'technical'
    }],
    'organization': {
        'name': 'Company',
        'display_name': 'Company',
        'url': 'http://www.company.com',
    },
    'valid_for': 24,  # how long is our metadata valid
    'accepted_time_diff': 120, #seconds
}

SAML_DJANGO_USER_MAIN_ATTRIBUTE = 'username'
SAML_CREATE_UNKNOWN_USER = True
SAML_ATTRIBUTE_MAPPING = {
        'email': ('email', ),
        'givenName': ('first_name', ),
        'sn': ('last_name', ),
        'uid': ('username', ),
}