Markets change and your data needs evolve with them. A demographic you gathered along time ago may no longer be relevant
or gathered, or possibly the values that are current are different than the values you were gathering a couple of years
ago. But the ability to target your customers can be negatively impacted if you do not pay attention to evolving
demographics.
About once a year it is good to profile your demographics looking at what values are in your database for each
demographic and the counts of those values. First, it may point out values to you that are no longer needed.
Second, as you review your values you may decide a value or demographic has outlived it’s usefullness.
At that point you have three choices. First, to map those values to a new value, this is not always possible,
but is often enough that it is worth pursuing. Another option is to decide to discontinue gathering the demographic,
but because of it’s density decide to keep the demographic or value for at least a year.
The third option is to purge the demographic or value from the active database.
The second option to reevaluate in a year should be a conscious decision, not a default.
Having obselete data leads to bad decisions since if you continue to select by it,the number of
records selected will be reduced, also if you continue to select by it, even though you deem it
obselete it is giving you the false impression of being very selective in your targets. Stay focused.
Clear out the garbage and focus on the good stuff!