Sometimes failed imports create "empty" objects in a library. The Remove Empty Objects option cleans out those empty objects.
Objects displaying without any description or details it indicates that there are empty objects in your library. In these circumstances, you should use Author-it's Remove Empty Objects.
There can also be rare cases when an object displays as normal but with an object code of zero (0). In this case, there is a field missing in the library data. Running the Remove Empty Objects function will correct the problem by reallocating the correct ID without removing the object from the library.