People often get confuse between advertising and public relation. Some people think that both are some or less the same thing. In simplest word one can understand is that advertising is something where one says he/she is the best while PR is making others say that you are the best.
Today we don’t see a Public Relation firm like those old firm where media relations and churning out press releases and calling journalists, it was like Pros would follow a pattern of working as they would ask for press coverage irrespective of the news value in the materials and continuously call a journalist to follow up. But now everything has changed massively in the PR sector.