Marketing:- The activity of showing and advertising a company's product in the best possible way.  Marketing involves advertising, selling and distributing products to a customer or other business.  In another way we say that marketing refers to the activities that a company does to promote the purchase or sale of a product, service or goods.
Digital marketing: - Any marketing that use electronic devices to convey promotional messaging and measuring its impact . Digital marketing refers to campaigns that appear on mobile phones , computers, tablets and other electronics devices.  
              Advantages of digital marketing 
1-Globally reach:- Now days world became like a village thats call global village.  Digital marketing offers to reac golabal market in very low cost.  A website allows you to find a new markets and trade globally for only a small investment.
2- low cost advertising: - A website cover global market and it's cost very low in other medium of advertising.  So in a low cost our product advertised globally .

3- Cover vast audience:- Now days most of people use internet in one way or other way. In only America more than 3 quarters Americans go online daily basis. So going through digital marketing we got a lots of lot number of audiences. 
 4- Traclble and  measurable results- measuring your online marketing with the web analytics and other online marketing tools make it easier to establish how effective your campaign has been. You can obtain detailed information about how audiences uses  your website and respond to your advertising. 
5- Know customers choice- if your customer database is  linked to your website then when some visited your site than you can greeted them with interesting offers.  By accepting your offer you know his choice . 
6 No need big building structure  In digital marketing by a laptop or computer and any electronic devices you advertise your product vastly by making a website.