In the realm of software development, the significance of product and process metrics cannot be overstated. These metrics serve as pivotal tools, guiding the evaluation and enhancement of software quality and efficiency. However, despite their undeniable importance, establishing and executing measurement programs often proves to be an intricate endeavor, which often stems from the intricate interplay of human factors that pervade the software development landscape. In this paper, drawing upon data derived from in-depth interviews and interactive workshops involving developers, stakeholders, and managers from four software development organizations, we identify challenges and best practices in communication around metrics. Based on our findings, we provide communication guidelines, which can steer practitioners and stakeholders toward more adept and proficient practices in the communication of metrics.