A sponsored post, also known as a promoted content, is a post to any company-driven information-oriented content which is specially sponsored as an endorsement by a particular business to allure a large amount of popularity within the promotional content and balance to the most effective or most observed page on the website.

Most of the sponsored post is promotional, which is meant to promote:

• Sponsorship for companies

• Sponsorship of their products

• Promotional advertisement for companies

Awareness: These sponsored posts are generally done to promote awareness among the people so that they will get a brief about the following company promoting their brand.
Services: The sponsored post is done to bring your notice towards the products and services the company is providing, they will inform you the whole of their valuable process and services they provide. 

Priority: When you're posting your sponsored content the admit will take guarantee that the post should not be removed within the given period of time, the admit will grant the high priority to that post and the promotional content, you can also add suggested internal link with that post so that the user will be directly redirected to your own website. 

So, there aren't such big differences between the basic post and sponsored post, the only major difference is the sponsored post is just to promote their content.