People sign up for mailing lists to follow ads on topics they are interested in. Advertising emails are sent to the addresses on these lists. The currency of mailing lists is also very important. The lists provided by good companies are constantly updated and up-to-date. Mailing lists are subject to classification as sectoral, regional, and foreign. At the end of advertising emails, there is an opt-out link so that the individual can leave the list if they wish. The advantage of e-mail advertising is that the advertisement is shown only to those who are interested, preventing unnecessary advertising spending by showing it to those who are not interested. The advertised product or service is also likely to be purchased by those who read the advertising emails. However, the returns are less than search engine ads. Because it is viewed by a more limited number of people. E-mail ads are charged in the following ways: unlimited advertising with a fixed fee, charging according to the content of the mailing list, based on the number of addresses, etc. Many people think that e-mail ads are advertising emails sent to random addresses. This is wrong. Moreover, e-mail advertising services prohibit this.