Duplicate content
Substantively identical or near-identical content available at more than one URL, within a site or across sites.
ContentRepublishing
Content syndication
Republishing the same content on third-party sites for reach; without correct canonicalisation it creates duplicates that can outrank the original.
In full
Google's guidance is that syndication partners should block the syndicated copy from indexing or use rel=canonical pointing at the original, because Google will otherwise choose whichever version it judges most authoritative — often the larger partner. Syndication is not a spam policy violation in itself, but syndicated content that adds nothing can weigh on the receiving site's quality. Partial excerpts with a link back are the lowest-risk pattern.
Example
A trade publication republishes a vendor's research with `rel=canonical` back to the vendor's original post.
Related terms
rel="canonical"
A link annotation (in the head or an HTTP header) that tells search engines which URL you consider the preferred version of duplicate…
noindex
A robots directive, delivered by meta tag or X-Robots-Tag header, that instructs search engines to drop a page from their index.
Digital PR
Earning editorial coverage and links from media outlets through newsworthy assets — original data, expert commentary, campaigns — rather…
Site reputation abuse
Publishing third-party content on a host site to exploit that site's ranking signals; a Google spam policy violation regardless of…