Disambiguation pages are pages for terms which are likely to be searched for, but which have multiple meanings. Joseph, for example, could refer to Joseph, son of Lehi, Joseph, son of Jacob, or Joseph Smith, Jr.. It conceivably also refer to a number of other important Josephs in church history, such as Joseph F. Smith. Joseph F. Smith, however, is almost universally referred to as "Joseph F. Smith" and not "Joseph Smith", or "Joseph". The term "Joseph" then, by itself, is not understood to be referring to him. The same is true for a number of other Josephs. (Surely there are also some which have not been given any consideration.)
The disambiguation pages below list more precise terms that might be referred to by the disambiguation page's title.