The biggest difference is that publicity is paid whereas the effects of public relations are achieved by giving the media by type of articles or presentations.
Explanation:
Advertising and the public that are mutually beneficial.
Paid vs Free:
Derive paid advertisements to promote online, print, TV, home and radio across various media types. PR is, however, a strategic interaction process that establishes partnerships between organizations
Advertising:
You charge to place an ad in the news.
Social Connection or Public Relation:
The Corporation for Public Relations creates techniques for media advertising. PR practitioners establish a number of techniques to bring the company a positive media coverage which is very efficient in growing the brand awareness of your target audience.