The social media difference
At this stage of development, social media advertising lacks the standard metrics that have served as a primary advantage for online advertising. Online advertising as a form of direct-response advertising has measurability built into its very existence. Advertisers can measure reach (the number of people exposed to the message) and frequency (the average number of times someone is exposed), and analyze site stickiness (the ability of a site to draw repeat visits and to keep people on a site) and the relative pull of creative presentations (a comparison of the ability for different creative executions to generate response). They can also monitor click-throughs (the number of people exposed who click on an online ad or link), sales conversions (the number of people who click through who then purchase product), and view-throughs (the number of people who are exposed and do not click through but later visit the brand's website). These metrics are applicable to the use of display advertising in social spaces. If L'Oreal buys display ads on Facebook, all of these metrics are available to gauge effectiveness.
However, for the more innovative approaches available, metrics like number of unique visitors, page views, frequency of visits, average visit length, and click-through rates are either totally inappropriate or irrelevant, or simply fail to capture information about the objectives of a social media advertising campaign. Our tendency is to count -- count impressions, visitors, friends, posts, players. There is still a place for numbers in the social media arena, but the numbers may be different from the ones marketers have traditionally used -- and they may not be effective if not combined with more qualitative data.
