One hundred years ago, companies such as Sears, Roebuck & Co. and J.C. Penny Co. used customer data to send out catalogs and mailers. Back then, the companies possessed small sets of data, mainly names and addresses of customers. Now, marketers have mountains of complex data and are faced with a modern conundrum: How much personal data is too much to incorporate into the content?
Just because something is true, it doesn’t mean it should be sent to the customer. Good personalization is relevant and valuable, but it shouldn’t be too specific, O’Keefe says, citing Netflix and Amazon as good examples for direct marketers. These companies know what their customers want, but they don’t go over the top in telling them things about themselves they may not yet know. 
In addition to linking to Letter Shoppe's designs (available on merchandise that is ultimately sold by Redbubble), the email campaign includes an endearing quote by the Featured Artist: "Never compromise on your values, and only do work you want to get more of." Redbubble's customers are likely to agree -- and open other emails in this campaign for more inspiring quotes.
In practice, Internet marketing will include the use of a company web site in conjunction with online promotional techniques described in Chapter 8 of the book such as search engine marketing, interactive advertising, e-mail marketing and partnership arrangements (affiliate marketing) with other web sites. Some businesses who "want to be top in Google", simply consider Internet marketing to simply equate to Search Engine Marketing, but while this is important this scope is too narrow to take full advantage of digital media.
Particular groups of customers can be targeted or even individuals. Offering individual customers special deals on merchandise and/or services on the customer's birthday, for instance, is one example of email marketing personalization. (A restaurant might send an email to customers on their birthday offering 50% off an entree,) Email marketing helps a business develop and maintain a relationship with a customer over time that hopefully results in increased sales and increased customer loyalty. 
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