direct marketing
US /dəˈrekt ˈmɑːrkɪtɪŋ/
UK /dəˈrekt ˈmɑːrkɪtɪŋ/

1.
a form of advertising in which companies communicate directly to customers through various channels, such as mail, email, or telephone, rather than through mass media
:
•
The company uses direct marketing to reach potential clients.
•
Email campaigns are a common form of direct marketing.