Electrochemical water splitting offers an efficient pathway for hydrogen generation, playing a key role in advancing green energy solutions. While developing efficient electrocatalysts is crucial, ensuring accurate evaluation of their performance is equally important. However, the rapid expansion of materials science and the growing interdisciplinary interest in electrochemistry have led to widespread misinterpretation of data, particularly among beginners to the field. This chapter lays out essential guidelines for assessing water-splitting electrocatalysts. It covers critical factors like experimental setup, electrode selection (reference, counter and working), and electrolytes. Additionally, it outlines key metrics for evaluating catalytic activity, selectivity, and stability, along with recommendations and best practices for standardized data reporting to enhance clarity and reproducibility in the field.