A wonderful plugin to easily create many custom sidebars. These sidebars can then select in the creation of a post / page / custom post type / category / taxonomy. We give an order, and select several at once.
You will see all active sidebars instead of seeing just one.

VISIT https://wordpress.org/plugins/advanced-widgets/

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Un maravilloso plugin para poder crear fácilmente muchos sidebars. Estos sidebars luego los podremos seleccionar en la creacián de un post / page / custom post type / category / taxonomy. Podremos darle un orden, y seleccionar varios a la vez.
Se verán todos los sidebars activos.

VISITAR https://wordpress.org/plugins/advanced-widgets/

Multiple Sidebars