In sewing, why is seam allowance considered important?

Seam allowance is crucial because it provides the necessary space to make adjustments and finish seams properly. When sewing, having an adequate seam allowance allows the maker to fit the garment correctly, as it gives room for alterations if the initial fit does not meet expectations. Additionally, a proper seam allowance enables the sewist to finish the edges of the fabric to prevent fraying, whether through techniques like serging, pinking, or binding. This allowance enhances the overall quality and durability of the finished garment by ensuring that seams can be reinforced or altered as needed without compromising the structure of the piece. Thus, the ability to adjust fit and finish seams effectively is a fundamental reason why seam allowance is emphasized in sewing practices.