Search syndication is a type of contextual advertising which allows online search advertisers to buy keyword-targeted traffic outside of search engine results pages.[1] This is considered to be an alternative to advertising on search engines, since 43% of all searches occur outside of the top search engines.[2]
Although search syndication falls under the umbrella of contextual advertising, they are not synonymous because contextual advertising also includes display ads while search syndication focuses on text ads sold on a pay per click basis.