Duplicate content.
Duplicate content Identical content located on different web page.
Duplicate Content. ... The grey box at the bottom refers to "Common Content" - items such as menus or navigational phrases that typically appear on most or all of your pages, and are therefore not usually considered to be duplicate content.
According to Google: Duplicate content generally refers to substantive blocks of content within or across domains that either completely match other content or are appreciably similar. Mostly, this is not deceptive in origin. People mistake duplicate content for a penalty because of how Google handles it.
Search engines like Google have a problem – it's called 'duplicate content'. Duplicate content means that similar content appears at multiple locations (URLs) on the web, and as a result search engines don't know which URL to show in the search results.
A vertical search engine is distinct from a general web search engine, in that it focuses on a specific segment of online content. They are also called specialty or topical search engines. The vertical content area may be based on topicality, media type, or genre of content.