Digital Marketing comprises many activities. Some of them are Search Engine Marketing, campaign marketing, social media marketing and e-commerce marketing. Activities like Search Engine optimization, Social Media Optimization and the use of display advertising, e-books and the use of other forms of digital media also come under digital marketing.
Digital Marketing also includes non-internet channels that have the option of providing digital media. Some examples are SMS and MMS option of mobile phones and ring-tones of mobile. Digital Marketing helps brands to provide online customer support throughout the day.