Temporary redirects tell clients and crawlers that the redirect in place right now should not replace the original URL in their memory. Search engines keep indexing the source URL, bookmarks stay pointed at the original, and caches assume the target may change tomorrow. 302 is the legacy HTTP/1.0 signal and historically allowed clients to downgrade `POST` to `GET` when following (the same implementation quirk that 303 was later specified to make explicit). 307 is the stricter HTTP/1.1 replacement that preserves the original HTTP method and body, which matters for API endpoints receiving form data. 303 (See Other) is the textbook answer to the POST-redirect-GET pattern used after form submissions to prevent accidental resubmission on refresh. URL shorteners usually default to 302 or 307 so campaign operators can repoint a link after launch without breaking existing links in search or cache. Temporary redirects also underpin authentication flows (after login, `303 See Other` back to the original page), load-based failover (temporarily route to a healthy mirror), and staged rollouts.