Why is the success of a PR effort difficult to gauge?

The success of a PR effort is difficult to gauge because its impact is often qualitative rather than quantitative, making it challenging to measure through traditional metrics. Additionally, PR outcomes can be influenced by numerous external factors, such as market conditions or public sentiment, which are beyond the control of the PR campaign. Furthermore, the effects of PR efforts may take time to manifest, complicating immediate assessment. Finally, the subjective nature of media coverage and audience perception adds another layer of complexity in evaluating success.