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The first step in web performance work is identifying the bottleneck. Browser developer tools expose the timing, size, and blocking behaviour of every request, which makes it possible to target compression, caching, or deferred loading of non-critical scripts instead of guessing.

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.

Crypto wallets fall into two broad categories: custodial and non-custodial. A custodial wallet is operated by a service that holds the private keys on the user's behalf, which is convenient but requires trusting that operator. A non-custodial wallet returns control of the keys to the user, which removes counterparty risk but also means that a lost recovery phrase cannot be restored by anyone.

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.

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.