https://majestycoffee.com/blogs/posts/how-to-make-strong-dri...'Bold' stands for 'richer, more flavorful, more intense', but it also indicates the roast level:
Literal text extract:
-->Dark Roast
Dark roasted beans are characterized by their deep brown color and oily surface. These beans have a bold, strong flavor, which is ideal when crafting a strong cup of drip coffee. They may even have chocolate or smoky notes, adding complexity and richness to your cup. When choosing dark roast beans, look for descriptions such as "espresso," "dark," "bold," or "extra bold."<--