Wikipedia:

A copyright collective (also known as a copyright collecting agency, licensing agency or copyright collecting society) is a body created by copyright law or private agreement which engages in collective rights management. Collecting societies have the authority to license copyrighted works and collect royalties as part of compulsory licensing or individual licences negotiated on behalf of its members. Collecting societies collect royalty payments from users of copyrighted works and distribute royalties to copyright owners.

Authors of literary or artistic works as well as holders of related rights enjoy exclusive rights to authorise or prohibit the use of their works. In cases where the rights cannot be enforced vis-à-vis individual members of the public or where individual management would not be appropriate, given the number and type of uses involved, right holders are granted a remuneration right instead. These rights are typically managed by collecting societies.

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Note added at 14 hrs (2014-09-03 13:20:05 GMT)
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Wikipedia in Spanish:

Las sociedades o entidades de gestión colectiva son organizaciones creadas por leyes de propiedad intelectual o por acuerdos privados para el manejo colectivo de derechos de autor y derechos conexos. Estas entidades, gestionan los derechos patrimoniales o conexos de distintos titulares de propiedad intelectual, como autores, intérpretes, ejecutores, productores de fonogramas u organismos de radiodifusión.