44As the Court has also held, the decisive factor for the purposes of applying the justification set out in point (b) of the first subparagraph of Article 6(1) of the GDPR is that the processing of personal data by the controller must be essential for the proper performance of the contract concluded between the controller and the data subject and, therefore, that there are no workable, less intrusive alternatives (judgment of 4 July 2023, Meta Platforms and Others (General terms of use of a social network), C‑252/21, EU:C:2023:537, paragraph 99).
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