Werbung in eigener Sache machen = self-promote, e.g. "He was a shameless self-promoter," "They were just promoting themselves," "Nancy soon realized that elf-promotion is indispensable to making it as a freelancer..."

Werbung in eigener Sache machen = self-promote, e.g. "He was a shameless self-promoter," "They were just promoting themselves," "She soon realized that self-promotion is indispensable to making it as a freelancer..."