There are two sorts of consolidation. One consolidation consolidates values and the other creates links to the original data.
You don't need to type labels on the summary sheet if you have ticked one of the Top row or Left column boxes. However if you're consolidating values and you've added or changed data then you'll have to refresh the consolidation because this consolidation is not dynamic. Refresh the consolidation by selecting Data Consolidation OK. This will then pick up new data in say C8.
You can also consolidate with links to the original data if you tick the 'Create Links to Source Data' box. Doing this will create a different 'look' where the Excel Outlining and Grouping functionality comes into play.
All this is perhaps better explained by MS themselves at
http://technet.microsoft.com/en-us/l.../cc750889.aspx
HTH
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