It's simple: you find everything there is to know about your customers, the products they like, their client histories, what kind of language intrigues them to read on ― anything you can get your hands on.
Kulula: uthola konke okumele ukwazi ngamakhasimende akho, imikhiqizo abayithandayo, imilando yamakhasimende abo, ukuthi iluphi uhlobo lolimi olubenza bafunde kukho - noma yini ongathola izandla zakho kuyo.