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| 121. | Accordingly, providers are to keep the required descriptions up to date. To that aim, they may need to regularly consider whether they still meet this legal requirement, or whether the descriptions need to be updated. Providers are free to devise their own systems to determine whether, when and how they will do this, considering elements such as how frequently changes are made, the effects of any such changes and when experiments (e.g. A/B testing) and other techniques (e.g. machine learning) used on their services may trigger changes to the ‘main parameters’ determining ranking.

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Source: EUR-Lex (Cellar) · retrieved 2026-09-25 · Text as adopted (Official Journal); later amendments are not incorporated in this text.