As marketers have known for ages, repetition is the key to recollection. Accordingly, to ensure high repetition, marketers typically use "roadblock" advertisements to reach 100 percent of the visitors to a particular website within a short period of time. Loyal website visitors often see such roadblocks multiple times per day, while marketers are guaranteed that even intermittent visitors will be exposed to their messages at least once.

The network blast strategy -- the ad network equivalent of roadblocking -- is ideal for driving a high volume of impressions within a short amount of time. Network blasts are perfect for major product launches, live events, premieres and political races promoting any sort of time sensitive information. Earlier this year, Spark Communications deployed a network blast on ValueClick Media to achieve awareness of the program "Burn Notice" in the hours leading up to its airing on USA Network.  

Because ad networks partner with thousands of websites, messages broadcast on ad networks tend to have a greater psychological impact on visitors than merely seeing the same ad on the same portal. Thus, a network blast will drive high impact awareness across a major portion of the internet audience within a short time span using the extensive reach of the ad network model.