The phrase "to expand the category" means to make a particular group or type of things larger or more inclusive. It involves increasing the variety or range of items that fall into that category. Full definition
Competition from mass retailers is another hurdle, especially for specialty retailers looking to add or expand the category in their stores. (petbusiness.com)
Understanding the function, effectiveness and benefits of different pest prevention products helps retailers take advantage of this rapidly expanding category and better serve their customers. (petbusiness.com)
These might be necessary to expand a category limit or cover a peril that otherwise would not be covered. (valuepenguin.com)