Digital marketing is a broad term that includes all marketing channels and methods you can use to promote products or services on the Internet but also on electronic devices such as TVs, mobile phones and electronic billboards.
Search Engine Optimisation(SEO) involves developing a website that is easy to categorize and find. SEO is a fundamental aspect of digital marketing strategies. This is an integrated approach to drives customers to your business through a web portal. SEO gives opportunities of substantial levels of free advertising; it would make your website rank primarily in the initial pages of SERP, and provide reasonably good ROI