The days of blanketing large groups of customers with messaging are gone. There is no one size fits all for customers, but faced with pressure to produce higher return on diminishing budgets, the customer engagement dilemma becomes more difficult for advertisers by the day.
In the end, it comes down to money. Advertisers want to spend the least amount of money to produce the most revenue. They want to overcome the issue memorialized by John Wanamaker, the pioneer of the discount department store, who famously said, "Half the money I spend on advertising is wasted; the trouble is I don’t know which half." The good news is that advances in real time technology have enabled them to do exactly that.