Two other practical limitations can be seen in the case of digital marketing. One,digital marketing is useful for specific categories of products,meaning only consumer goods can be propagated through digital channels.Industrial goods and pharmaceutical products can not be marketed through digital channels. Secondly, digital marketing disseminates only the information to the prospects most of whom do not have the purchasing authority/power. And hence the reflection of digital marketing into real sales volume is skeptical.[citation needed]

E-marketing is a process of planning and executing the conception, distribution, promotion, and pricing of products and services in a computerized, networked environment, such as the Internet and the World Wide Web, to facilitate exchanges and satisfy customer demands. It has two distinct advantages over traditional marketing. E-marketing provides customers with more convenience and more competitive prices, and it enables businesses to reduce operational costs. https://dab1nmslvvntp.cloudfront.net/wp-content/uploads/2016/05/1463308986image05-1024x694.jpg
Although online marketing creates many opportunities for businesses to grow their presence via the Internet and build their audiences, there are also inherent challenges with these methods of marketing. First, the marketing can become impersonal, due to the virtual nature of message and content delivery to a desired audience. Marketers must inform their strategy for online marketing with a strong understanding of their customer’s needs and preferences. Techniques like surveys, user testing, and in-person conversations can be used for this purpose.
Companies considering the use of an email marketing program must make sure that their program does not violate spam laws such as the United States' Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM),[9] the European Privacy and Electronic Communications Regulations 2003, or their Internet service provider's acceptable use policy.
Marketers try to measure customer response to direct mail through personalized URLs and coupon codes, but there’s no guarantee customers will visit websites from a specific URL or buy products using a specific code. O’Keefe says that consumers will often receive a piece of mail, get inspired and Google the product they want to buy. The difficulty of attributing conversions may be a reason why the pendulum has swung toward digital, O’Keefe says.
Direct mail is a type  of direct marketing in which businesses send letters, postcards or other promotional materials to past, current or potential customers or clients. Direct mail campaigns may be targeted to either a consumer or business or both.  In many cases, the mailing is directed to a target demographic (i.e. home owners) or geographic market (i.e. a specific neighborhood). In most cases, it's mass or bulk mailing, but you can send direct mail in smaller quantities as well.
Email marketing has been around for decades, but it is still one of the most effective digital marketing channels available when it’s done well. Email today needs to feel like one-on-one conversations with each audience member, but it also needs to scale. Make sure your strategies are up-to-date so your emails are getting delivered and cutting through the noise.
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