Part of the magic of real-time bidding is found within machine learning. This involves using sophisticated algorithms to “learn” complex patterns based on large amounts of data in order to make optimal advertising decisions. The importance of machine learning is cost avoidance and value creation. Cost avoidance is simple to understand: data-driven optimization strategies help reduce waste by identifying the most relevant impressions while selecting the best ads (better creative message, better offer, etc.), which in turn improves performance and ROI (define). Value creation, on the other hand, happens when buyers and sellers of commoditized offerings are more efficiently brought together for a transaction.
To create machine learning magic, two ingredients are required: scale and prediction. Scale speaks to the need to make more users/impressions available through the auction marketplaces, and increase the number of advertisers bidding on these users. The bigger the scale, the more sophisticated the data-driven prediction can be. The second ingredient refers to the idea that prediction needs to be “accurate enough.” Amazon and Netflix have demonstrated that when you provide an accurate prediction of what consumers want, the business grows in two ways:
- Better inventory control and more purchases/utilization.
- Better targeting becomes a custom delight feature when it’s perceived to be quite accurate by average consumers.
The ability to deliver relevant choices in real time based on what consumers reveal about themselves creates a virtuous cycle:
Ads/recommendations become more accurate → consumers are willing to share additional information about themselves → the machine learning algorithm for ads/recommendations becomes even smarter
In digital advertising, the machine learning prediction ultimately boils down to two parts: identifying your target audience and reaching them efficiently. The first part requires machine learning at the user level to learn the most optimal audience segments to target; the second requires machine learning to drive real-time bidding strategy with precision. For instance, demand side platform technology allows advertisers to have global control over how many times each user sees the ads (i.e., frequency capping) and how they see them. This begs the obvious question, “what is the optimal number of ad repetitions?” The answer might be an average of five times over a period of seven days. Problem solved? Not quite.
To begin to solve this for marketers, machine learning analyzes the data of users who have and have not responded to the ads after each impression. The next step is to dig deeper to discover how attributes of the ad impressions and that of the users affect the optimal value. Impressions having higher influence increase the effective frequency count; while certain types of users requiring a higher numbers of ad repetitions reduce the effective frequency count. The outcome of each ad impression is also probabilistic, or in other words, gives the right answer with high probability, but not certainty. This requires the model to dynamically evaluate the expected value of each impression in real time to adjust the bid on a continuous scale.
From an auction market standpoint, value creation also depends on the number of smart buyers. A room full of bidders with over-simplistic bidding models will quickly realize that real-time bidding isn’t working for them. Bidding inefficiently not only affects the availability of desirable inventory for other bidders, but also reduces overall ad relevance (a negative user experience) at large.
There are a number of general steps you can take to leverage machine learning to encourage value creation. In the order of complexity:
- Collect every bit of data on the advertiser side and protect them. For example, connect Web analytics data and online/offline CRM (define) data and apply them to the optimization of online advertising.
- Analyze the data; build machine learning models to leverage the power of these data points; predict who your best customers are; predict the best offer and creatives for different customers based on what you know about them.
- Invest in explanatory model (such as attribution) as much as predictive model.
- Integrate creative optimization with audience optimization.
- Model cross-media (search, display, mobile, etc.) interaction and optimization.
If executed correctly, marketers will reap the benefits of real-time bidding and data-driven advertising. Better ROI and value in the marketplace is here, but it’s up to marketers to learn from the data, make predictions, and leverage those insights for optimization. Put your machine to work and let the magic happen.
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