You went to a party; there you saw a beautiful girl. You went to her and asked her for her phone number. The next day you called her and said, "I am a very rich man. Marry me."
This is called "Telemarketing".
You went to a party; there you saw a beautiful girl. You got up from your seat, straightened your tie, ran your hand through your hair, then reached close to her and made a drink and offered it to her. You opened the door for her; she deliberately threw her purse down; you quickly picked it up and returned it to her, offered her a ride, and said, "By the way, I am a very rich man. Will you marry me?"
This is called "Public Relations".