§3.3.4 Default settings, sorting & filtering mechanisms

56. As a type of personalisation, default settings which can be rearranged, undone, or ‘overridden’ by consumers using sorting or filtering tools can have an important impact on the ranking of offers of goods and services of business users. These mechanisms could be ‘main parameters’ in and of themselves, for example where their use by consumers is very frequent and they are particularly relevant to ranking. If so, it can be important for business users to understand, for example, whether the ranking after application of the filter is based on all offers or if ranking then depends on whether the offer of goods or services meets certain criteria for inclusion, such as a minimum number of reviews in order for goods or services that are referenced under the default settings to be featured under a ‘quality’ filter. The same goes for the size of the possible impact of the different filters on the ranking. 57. In addition, given the logically increased importance of the parameter used (i.e. the filter) in specific filtering mechanisms (e.g. price or review score), other parameters that apply besides the filter might equally increase in importance in terms of the weighting applied to them relative to the situation where no filter is applied. This heavier weighting may namely be necessary to allow a large number of offers that may not differ significantly on elements such as price or review score (i.e. the filter), to still be ranked effectively. Such other parameters may then, depending on the case, constitute ‘main parameters’ under Article 5. Besides those situations, it can be important for business users to understand the possible implications of the use of filters for the relative weight of parameters other than the filter that is applied.

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