customer acquisition

Advertising (including the Internet and Google hits) Word-of-mouth/recommendations Exhibiting at trade shows Personal selling Mentions in newspapers etc Promotions (eg free give-aways)

dear sir if the questions comes what are the method of customer acquisition ,customer retention and customer extension using electronic media ,then what should we write ?

For customer retension, co.can send the newsletter via email about the offers,about new products ,discounts and other services.so,they can be connected with co.

thank u srijana