The present invention relates to a conversion control system comprising a database storing data defining a set of rules, an interface to receive anomaly information from an analysis machine, wherein the anomaly information identifies regions of a web containing anomalies, and a conversion control engine that applies the rules to the anomaly information to determine a value for at least one product selection parameter for each of a plurality of products, wherein the conversion control engine selects one of the products for conversion of the web based on the determined values.
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