door-to-door selling; individual sales
Refers to selling products directly to individual customers, often by visiting homes or offices, as opposed to bulk or wholesale sales.
This company uses door-to-door selling as its main sales method.
訪問販売 specifically means visiting homes to sell, while 個別販売 can also refer to selling individually rather than in bulk, without necessarily visiting the customer.
Compound of 個別 (individual, separate) and 販売 (selling, marketing).