Conversion rate is the figure companies optimise. The objective is rational given the data available: standard analytics platforms are built to measure traffic flows and on-site behaviour, and conversion rate is the natural output variable of a system designed to observe the population that arrived. If the objective is to improve the proportion of visitors who complete a desired action, the tools exist, the metrics exist to track progress, and the optimisation logic is coherent within those parameters.
The limitation is structural. The population that did not arrive is not recorded. When a buyer evaluates a category and chooses another supplier, no standard analytics tool records that event. Google Search Console records the searches in which the business appeared. The volume of demand behind those searches, and the part of it that went to competitors, is a separate question that no conversion funnel report answers.
Demand Leakage is that part: the share of the business demand that leaks to competitors. A company can have a high conversion rate and a high Demand Leakage at the same time. The two figures coexist as a stable and common condition. The company handles the demand it receives efficiently, and a larger volume of visibility goes to competitors. Improving the conversion rate does not reduce the leakage. Visibility sets the ceiling, and conversion efficiency operates beneath it.
Continued investment in conversion rate improvement against a constraint that conversion rate improvement cannot resolve. The two variables are independent. They operate at different positions in the demand chain, they respond to different interventions, and the causal relationship between them runs in one direction.
Conversion rate is downstream. Demand Leakage is upstream. Measuring only the downstream variable and optimising accordingly is internally consistent and commercially incomplete.
Conversion rate shows how well you handle the demand that finds you. Demand Leakage shows how much of your visibility goes to competitors. A capital allocation decision that affects either figure needs both.
The gap has a revenue figure.
Brand Demand Scan measures your Demand Leakage and states the revenue gap it represents.
View Brand Demand Scan →Brand Demand Scan puts a revenue figure on the gap this note describes, from your own Search Console data. Leadership decides where the next euro in marketing goes against that figure, and the RoI² Framework verifies the profit each decision adds.