What a cookie wall means
A cookie wall is a specific variant of the standard cookie notice. A regular cookie banner offers accept, reject or manage settings, and the user can keep browsing even after rejecting tracking. A cookie wall removes that third option: if the user does not accept tracking cookies, they cannot access the content, unless they pay.
That is why the model is also called consent or pay. The term describes the choice presented to a visitor the moment they land on the site: consent to the processing of their data for advertising purposes, or pay a fee, usually a subscription, to see the same content without that processing.
The difference from a conventional cookie banner is not only technical. A banner that respects the General Data Protection Regulation leaves the user a genuine option to refuse without losing access to the service. A cookie wall ties access to one of two options, consent or payment, and that condition is exactly what data protection authorities examine when assessing whether the consent obtained is valid.
Publishers and online stores use it mainly to fund free content through behaviourally targeted advertising, a revenue source that shrinks whenever a user can reject tracking at no cost to themselves.