Yes, you should use both. Do posting on social media sites and also do article submissions on high PR sites only.
In marketing, diversity leads to stability. The more effective marketing channels you use, the better.
Depending on your market, don't overlook offline content. Offline-to-online sales funnels tend to be hyper effective. Are there offline magazines your target audience reads? If so, drive 'em to a unique URL where you can track the response.
---James Clouser, Copywriter & Marketing Consultant http://www.jamesclouser.com
As per my suggestion, content is now-these-days acting as the voice of company's brand and is important for allocating the respect, investment and focus it actually requires. It is very important to have a clear understanding of the content for generating the revenue. It should always be created with an aim of improving the overall business of any firm.