Automatic selections in Photoshop often create jagged, pixelated edges that look unprofessional when zoomed in. These blocky borders can ruin an otherwise perfect cutout, making your work appear amateurish regardless of how carefully you made the initial selection. Three simple sliders in Photoshop's Select and Mask workspace can
Read the full article here: How to Smooth Pixelated Selection Edges in Photoshop Photoshop Roadmap