301 Redirect — Definition
A 301 redirect is a permanent instruction that tells a browser (and Google) "this page has moved — go here instead." When someone clicks an old link or ...
What it is
A 301 redirect is a permanent instruction that tells a browser (and Google) "this page has moved — go here instead." When someone clicks an old link or types an old URL, they land on the new page automatically without seeing an error. The 301 tells Google the move is permanent, not temporary.
Why it matters
Every time you restructure your site, change a URL, or migrate to a new domain without setting up 301 redirects, you lose traffic and SEO value. Google's trust in your old pages — built over months or years — evaporates. Broken links also destroy user experience.
The mistake most people make
Doing a site redesign and changing all the URLs without setting up redirects. This is one of the most common causes of sites losing 50%+ of their organic traffic overnight after a redesign. Redirects aren't optional during a migration — they're the whole ballgame.