Better CSS Shapes Using shape() - Part 4: Close and Move | CSS-Tricks
Briefly

The close command in CSS shapes explicitly signals the end of a shape but is frequently unnecessary. The browser can close shapes automatically, as shown with triangle examples. While commands like 'move' and 'close' might not often be used, they provide clarity in specific situations. Understanding the close command enhances comprehension of shape() syntax and ensures precise shape rendering when needed. It allows for flexibility and control in shape definitions that automatic closing might not accommodate.
The close command is used to explicitly end a shape defined in CSS, but browsers often handle closing shapes automatically, reducing the necessity for it.
Shape definitions require an initial 'from' command and typically end with a close command. However, browsers can automatically close shapes, making explicit commands sometimes unnecessary.
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