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SEO Glossary of Terms
A Glossary of Terms relating to search engine optimisation (seo)
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Canonical URL

A canonical URL is a URL that is the best indexed version. It does not contain any duplicate material which can be a problem when using inconsistent links as the same content can get indexed many times for different URLs and this can cause problems. In order to index the root level of a URL it is best to end it in / this prevents it being duplicated.