What is the relationship between the albatross and the mariners at the beginning of the poem 'The Rime of the Ancient Mariner'?

Well, when we first see the albatross in the poem the crew thinks that it is a good omen, and believe that it is helping them, so they feed it and cheer it on. We learn later in the poem that they believe that the bird brought the wind to them and helped them continue. Later, after the albatross is killed, they believe instead that it brought the fog and mist, and think that it was a great idea to kill it.