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HTTP Redirects: 301, 302, 307, 308 & HSTS

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Why redirects exist: migration and security

HTTP redirects tell the browser: 'the resource you want is at a different URL.' They serve two main purposes: URL migration (site restructure, domain change) and protocol upgrade (HTTP → HTTPS).

Choosing the right redirect code matters: 301 is cached by browsers (fast, but hard to change later). 307/308 preserve the HTTP method (critical for POST forms). Getting this wrong breaks forms or loses SEO value.

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