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Glossary

Letter 31 term in the glossary

Marketing, e-commerce and advertising terms starting with the letter 3. Each one explained in plain language, with links to related terms.

301 redirect

A way of telling browsers and search engines that a URL has changed permanently — anyone who visits the old address is automatically sent to the new one.

Essential when changing a site's structure or domain: without a 301 redirect, the visibility built up by the old address simply disappears.

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