Let's have a brief look at the ways by which digital marketing is cost-effective:
Using social media to promote the products or services that you are offering to your potential customers.
Using re-targeted ads to drive potential and quality traffic back to your business website.
Engaging your customers with quality content related to the products or services that you are offering.
Very high return on the small investment made in marketing.
Blogging.
Last but not the least, brand recognition and brand awareness in the market at a less cost.