While our Shade Smoothing method does give our object a visually smooth look, we still have some visual artifacts along our edges. We can solve this problem by Subdividing our object's surface.

With our object selected, we are going to click our Modifiers button from the properties pannel.

Click Add Modifiers and choose Generate then Subdivision Surface. With the Subdivision Surface modifyer added, we are going to keep the Levels Viewport value at 1, and change our Render at a value to 1.

Levels Viewport: This setting determines how many times each face of a mesh is subdivided when displayed in the 3D Viewport. By increasing this value, you can achieve a smoother appearance for your model during editing.

Render: The Render setting, which specifies the subdivision level used during the final render. To ensure the rendered output matches what you see in the viewport, set both Levels Viewport and Render to the same value.