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Open source licences define how code may be used, modified, and redistributed. Permissive licences such as MIT impose relatively few conditions, while copyleft licences such as the GPL require derivative works to be released under the same terms, so teams need to check compatibility before adopting a dependency.

A content delivery network places cached copies of static assets on servers in many geographic locations, bringing them closer to visitors. For sites with heavy images, video, or stylesheets, a CDN can noticeably reduce the time it takes for the first screen to render.

Search rankings depend on a mixture of content quality, page structure, inbound links, and user behaviour. In practice, original content that solves a specific problem tends to hold its position longer than pages that merely repeat keywords without adding anything useful.

Accessibility work focuses on making a site parse correctly for assistive technology such as screen readers. Writing descriptive alternative text for images, maintaining sufficient contrast, and using a semantic heading hierarchy are among the most common improvements.