In order to run a successful business, one needs to do marketing. One of the most important aspects of marketing is the advertisement, because unless the customer knows or becomes aware of your products and services, how are they going to buy it?
In the present times, companies prefer to focus quite a bit of their money in email marketing software since a lot of their marketing is done via emails. Everyone checks their email at least once a day, and therefore, they are bound to see what you have to offer them. Sending emails with the idea of improving the relationship of a business with its existing or previous customers, to support customer loyalty and repeat business, obtain new customers or persuade current customers to buy something right away, and so on.
Other than the above-mentioned points, since e-commerce is gaining so much popularity and every few days a new online shopping site is popping up, using email for an advertisement is the best way of marketing.