Breakdowns let you break down Analytics variables into more
specific data. For example, you can break down the visitor age group
report/dimension by the type of search engine the visitors use.
Note: Breakdowns were previously divided into subrelations (conversion
reports broken down by conversions report) and correlations (traffic reports
broken down by traffic reports.) These limitations are no longer in place. You
can break down conversion variables (eVars) by traffic variables (props) and