Audience data is a measure of the demographic profiles which are recent statistics, and household data is data from peoples homes. Audience data could be used as feedback on whether an advertiser is reaching out to the intended audience. Demographic numbers measure the average number of individuals in theselected household.
Good points- Gives the creators insight on whats working well, it also provides evidence on what peoples like.
Bad points- Some viewers may be channing flicking, or not actually watching whats on, therefore results wouldnt be accurate.