“Expand” means to increase in scope from a preexisting entity

[Cambridge Dictionary, “Expand”, Cambridge Printing Press, ] 

*sth- something 

to increase in size, number, or importance, or to make something increase in this way: 

expand into sth These companies need to expand into new markets because they have reached market saturation at home. 

expand rapidly/greatly/significantly 

expand the range/scope/capacity Supermarkets continue to expand the range of products and services offered in their outlets. 

expand a business/company/programme 

Production capacity could expand by up to 30%, thus bringing down prices.