Public relations is more about building your client's reputation but at the same time you need to be honest at some places as you cannot cheat your audience. A customer does not require each and every information of your organization but he should be given what is in his interest.

Advocacy is more about presenting information in a transparent manner. So, being a public relations specialist, you need to be transparent wherever it is important to be, but you need to remain objective at times too, as it is stated earlier that your audience does not require every detail of the company. It is all about balancing the reputation without compromising on the facts.