You can stay in contact with your clients (or make contact with potential clients) via your e-mails. An electronic newsletter, for instance, is an excellent means of ensuring customer loyalty. Recruiting new clients by e-mail is another possible technique, but this requires a
good database . Do not forget that this is subject to privacy rules (which regulate the sending of unsolicited advertisements by e-mail).
Creating an e-mailing assures the loyalty of your clients and likely potential clients with a very high cost-performance ratio, applicable to fields such as cross-selling (product discovery) and up-selling (increasing turnover with a client).