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Build Results shows the distribution of builds by status (success, fail, abort, and few more) on a daily basis within 1 month up to the current day. Ideal target for this chart is all success (means no failures) for each day. 

How this metric helps

This not necessarily a "metric" (as it can hardly be represented as a single number), but rather a chart.

Build failures are inevitable, especially when multiple builds are generated in a single dayfailures might happen from time to time. Monitoring of those failures vs. overall picture will help immature teams and processes to evolve and introduce stronger quality guards for the committed code - thus increasing the efficiency of a whole delivery pipeline. By tracking failures, summarized on this chart, you can quickly identify the changes that led to the a failure and resolve them more quicklythen target improvements within a process more efficiently. In a wider sense the metric , this chart shows how healthy a deployment build/Ci/Cd process is, and how effective your developers are at resolving and preventing failures.

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