The Purpose of Life - Made Simple

What's the difference between Mormon.org and Lds.org?

     Both websites are official websites of the Church of Jesus Christ of Latter-day Saints. However, the purpose of Mormon.org is primarily to educate members and non-members alike about the beliefs of the Church and to invite all to come unto Christ. Mormon.org is also the site where you can chat live with a missionary, request a free Book of Mormon, request a visit from your local missionaries, read the profiles of some Mormons in your area and throughout the world, and find information about LDS (Latter-day Saint) meetinghouses and congregations in your area.
     Lds.org is more geared toward providing Church members with resources such as media (archives of General Conference talks, hymns and an online hymn player, Home and Visiting Teaching messages, Church news, etc.) and tools like ward directories and creating/managing your LDS account. The website also has many other features and purposes and is probably the Church's main website.