EntityAttribute
Entity attributes are the build block of your entity and describe specific characteristics of this. Product attributes can be organized into entity type, which are then used as templates for creating entity.
You can create as many entity attributes and entity type as necessary for your projet. For example : Brand, Picto, ...
For create a new attribute, you can go to System > Attribute > Custom Entity :
You arrive on the list of existing attributes:
You can click on the Add New Attribute button to go to the create form:
After save your new attribute, you see it in attributes list. It only remains to add it to an entity type.