Fifty grams is common when a recipe uses a modest amount of cocoa, sugar, oats or butter. It is less than half a cup of flour, about a quarter cup of granulated sugar and more than half a cup of cocoa powder. This is a useful example of why a gram value alone cannot identify a cup amount.
For an amount this small, tablespoons can be easier than trying to judge an imprecise fraction of a cup. The converter provides a practical spoon estimate, but a scale remains more repeatable for baking.
You may see 50 grams in frosting additions, small-batch batters, nut toppings, cocoa mixtures and scaled-down recipes. Check the ingredient line before using any volume equivalent.