§3.3.8 Randomisation

63. In practice, certain providers may use techniques to reorganise the relative prominence given to offers of goods and services (partly) in a random manner, for example, in order to refresh the look of a landing page. Randomisation can also be applied, for example, to make ranking more dynamic, to distinguish the relevant online intermediation services or online search engine from others. Where such factors constitute ‘main parameters’, the providers concerned have to take this into account in their descriptions. They could, for example, explain how such techniques are applied (by reference to when they are used, how long they are used, how significant the use is, etc.), as well as their impact. Such explanations could provide a facts-based indication of the ‘amplitude’, i.e. the size of the potential impact of randomisation on ranking, which would also help users understand the importance of adopting ranking optimisation techniques for different online intermediation services and online search engines on which they may be present.

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Source: EUR-Lex (Cellar) · retrieved 2026-09-07