Indicates whether this field may be returned in a search result or not, i.e. whether the value itself is stored in the Index. Note that stored fields will still only be returned if the Query object passed to the Generic Search Server indicates that they should be returned. Every field should be either indexed or stored or both - if a field is neither then it is of no relevance to the Search Service. Again, not storing values that your searches will not use will minimize index size and help performance, so only store the fields your searches will use.