Digital marketing is a very broad term which encompasses search engine optimization(SEO), social media optimization(SMO), search engine marketing(SEM) etc. SMO makes use of RSS feeds, social news and bookmarking sites, as well as social media sites and video and blogging sites. SMO is a part of Digital Marketing, in that the goal is to drive traffic to your Web site.

We can start implementing the 5 golden rules of SMO

Create shareable content-

This is fundamental to social media marketing. In SMO, determining the content that your audience prefers to share across different social media platforms is an important task.

Make sharing easy-

Including or embedding buttons and widgets to make the sharing quick for facebook, Instagram, whatsapp and so on. Recommending or bookmarking within your own site and blog can also be included.

Reader's engagement-

It's commonplace now to reward Liking or commenting or sharing through a promotion or by offering content.

Use of keywords-

Keywords are important parameters for various things such as your website, blog content, and ad campaigns, so it should come as no surprise that keywords matter with your social content, too. This also helps keep your content relevant to your target audience.

Proactively share content-

This covers the process and format for sharing beyond your central hub. This can include syndicating articles to other partners or platforms like Slideshare or Scribd. Some also create their own widgets for embedding or sharing on other sites (atomization).
Following these steps will help you make the most of your optimization efforts.