Historical Quality Score and Why It Matters To Search Marketers

By February 5th, 2013

Of all the search publisher metrics available, Quality Score seems to always receive the most attention; yet search marketers have the least amount of visibility into how to effectively improve it and its impact on performance. What we do know is that every time a user conducts a search that triggers ads, a Quality Score is calculated based on a number of factors, including:

  • The keyword’s past click-through rate (CTR)
  • The display URL’s past CTR
  • The account history
  • The quality of the landing page
  • The keyword/ad relevance
  • The keyword/search relevance

Notice that the first three factors on Google’s list reference performance history, even though the history of a keyword’s Quality Score is unavailable within the AdWords interface. Instead, rather than showing different Quality Scores across time, Google displays a single Quality Score that provides an estimate of that keyword’s overall quality.

For the most part this is adequate—search marketers analyze Quality Score at individual moments in time to understand keyword relevance and performance issues. However, this one-off-style approach to analyzing Quality Score fails to provide insight into how search marketers’ continuous efforts to optimize campaigns impact Quality Score, either positively or negatively.

Whether it’s testing brand new creative or introducing additional negative keywords, improving a keyword’s Quality Score can lead to a lower cost-per-click (CPC) and a higher ad position. Changes in these two metrics can subsequently impact, among other things: CTR, costs, and return on investment (ROI). Unfortunately, the influence each of those best practices has on keyword Quality Score is frequently lost with time, especially within larger accounts. Imagine having to record the daily Quality Score for two million keywords affected by new creative messaging.

Marin Historical Quality Score Chart

To understand the impact of optimization efforts on Quality Score, search marketers need the ability to trend historical Quality Score, against other performance metrics, over time.

For example, by trending Quality Score and average CPC over a 3 month period, search marketers can understand the exact impact on cost that comes from an increase in Quality Score from 6 to 8. Trends that include other metrics like ROI and conversion rate highlight the indirect impact that Quality Score has on conversion and revenue goals. Though the concept of trending Quality Score over time appears basic, many search marketers are unable to do so.

To see a demo of historical Quality Score and other advance metrics in action, please contact Marin.

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